氧气

吸收。指物体把外界的物质吸到内部，或指组织把成员招收进来，也指对知识的理解和领会。

The height of an object or place above sea level.

事物所具有的性质、特点或基本特征。

Any living thing, or the study of living organisms. Basic term for IELTS biology-related reading passages.

Blurry; vague; indistinct.

呼吸；呼气和吸气。

To burn; combustion.

计算这次旅行的总费用。

To calculate, estimate, or figure out something using data, logic, or mathematical methods. It implies a process of reasoning from known facts to unknown values.

To calibrate, adjust, or check for accuracy against a standard. It is used for instruments, data, or plans.