由此可见

You use it at the beginning of a sentence or a new clause. First, you state your facts or observations. Maybe you mention that your friend hasn't replied to your texts for three days. Then you hit them with the phrase: 由此可见, he is either very busy or ignoring me. It usually follows a comma or starts a new sentence. It’s very flexible! You can use it in a serious business presentation about declining sales or in a casual chat about why the local coffee shop is always empty. Just remember: evidence first, 由此可见 second. It's like the punchline to a logical joke, though maybe not always funny.

This phrase sits comfortably in the 'neutral to formal' zone. It’s the tuxedo of logical connectors—classy but not so stiff that you can’t wear it to a nice dinner. You’ll see it all over news reports, academic essays, and professional emails. However, it’s also perfectly fine for serious personal discussions. If you're arguing with your partner about whose turn it is to do the dishes, using 由此可见 might make you sound a bit like a lawyer, which could be funny or dangerous depending on your relationship! Avoid it in super-casual slang-heavy texts with your besties, as it might sound a bit 'extra.'

Think about a YouTube tech reviewer. They show that a new phone's battery dies in two hours. They might say, 由此可见, the battery life is terrible. Or consider a travel vlogger visiting a hidden temple that has no tourists. They might comment, 由此可见, this place is truly a hidden gem. In the world of online shopping, if a product has 5,000 one-star reviews, a savvy shopper would think, 由此可见, this product is a scam. It's the phrase for the 'aha!' moment after you've looked at the data.

Use it when you want to sound convincing. It’s perfect for when you’re explaining a 'why' or a 'how.' Use it in job interviews when describing your past achievements: 'I increased efficiency by 20%, 由此可见, I am a fast learner.' Use it in school essays to connect your research to your thesis. Use it when you’re analyzing a movie plot with friends on Discord. It’s great whenever you want to show that you're a logical, thinking person who doesn't just pull conclusions out of thin air.

Don't use it for simple cause-and-effect that doesn't require 'seeing' or 'concluding.' For example, 'I’m hungry, 由此可见 I will eat' sounds weirdly dramatic. Just say 'so' (所以). Also, don't use it if you haven't provided any evidence yet. You can't just walk into a room and say '由此可见, it's raining' unless you're holding a wet umbrella. It needs the 'this' (此) to refer back to something. If you use it without context, people will look at you like you’ve missed a page in your own script.

One big mistake is putting it in the wrong place. Learners often try to stick it at the very end of a thought, but it belongs at the start of the conclusion.

✗ 他很努力，他会成功，由此可见。

✓ 他很努力，由此可见，他会成功。

Another mistake is using it as a synonym for 'because' (因为). It’s the result, not the cause.

✗ 由此可见 天气不好，我们没去。

✓ 天气不好，由此可见 我们不能去野餐了。

Also, try not to over-formalize your casual life. Using it to explain why you chose vanilla over chocolate might make your friends think you’ve spent too much time with your HSK textbook!

If 由此可见 feels a bit too long, you might hear 可见 (kějiàn) on its own. It’s the 'casual Friday' version of the phrase. It means the same thing but feels a bit faster. In very formal writing, you might see 由此观之 (yóu cǐ guān zhī), which is basically the 'ancient scrolls' version. On social media, you might see people use 看来 (kànlái), which is more like 'it seems' and is much more common in daily speech. If you want to be super academic, you might use 综上所述 (zòng shàng suǒ shù), which means 'to summarize the above.'

Is it too formal for texting? Not if you're discussing something important, but for 'where are we eating?' stick to 所以. Does it always need a comma? Usually, yes, to give the listener a tiny break to process the logic. Can I use it to start a paragraph? Absolutely, as long as the previous paragraph provided the evidence. Is it the same as 总之? Not quite; 总之 is for summarizing, while 由此可见 is for concluding based on specific evidence. Think of 总之 as the 'TL;DR' and 由此可见 as the 'therefore.'