Preemergent
a. (植物种子)出土前的,出土前施用的
🗣️ 情景例句
Yes. About four years ago.
是的 ，大约四年前走的。
His health has been lousy.
他的健康状况近来很糟。
We need to make a change on our last order.
上回的订单我们需要更改。