Classes of pesticide toxicity
[化] 农药毒性等级
🧩 词语组成解析
n. 级别, 阶级（class复数形式）
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
toxicity
[[tɔk'sisiti]]
n. 毒性\\n[医] 毒力, 毒性
🗣️ 情景例句
How long are you going to stay here?
您在这里呆多久？
By falling we learn to go safely.
吃一堑，长一智。
Soon the errors will have multiplied to the ten-foot scale,
很快这种偏差会增加到10 英尺的范围，