Activity test
[化] 活性试验; 催化剂的活性试验
🧩 词语组成解析
🗣️ 情景例句
You're much thinner since the last time I saw you.
你比我上次见你的时候瘦多了。
He's a composer of folk ballads.I like his music a lot.
他是民谣歌曲作曲家，我很喜欢他的音乐。
The first sign of disaster was a dead sheep floating down.Next came a horse, swimming bravely,
灾难的第一迹象是一只死羊顺流而下，接着一匹活马勇敢地与水搏击。