Come forward new formula to count mortality of lac insect.

提出了新的紫胶虫死亡率计算公式。

youdao

I shall count three, and on the word 'three', you must lean forward suddenly.

我一会儿数三下，当我数到三时，你们必须突然地向前倾。

youdao

I shall count three, and on the word 'three', you must lean forward suddenly.

我一会儿数三下，当我数到三时，你们必须突然地向前倾。

youdao