Optical activity（）：n. - 完整释义与助记

🧩 词语组成解析

optical ['ɑptɪkl]

adj. 视觉的，视力的;眼睛的;光学的;

optic光学的 + al 表示属于...的、具有...性质的、如...的 → a.眼的；光学的

activity [æk'tɪviti]

n. 活动;活跃，敏捷;活动力;教育活动;

act行动，做+ivity状态→活动

Yes, I'm quite satisfied. That would be more than I have expected.

我很满意，比我期望的要多。

I have a dog, but it's very quiet.

我有一只狗，不过它很安静。

Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.

只有地球提供理想的条件，而即使在这里，植物和动物的进化也用了40亿年的时间。

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output limits