Concentration gradiant
[电] 浓度梯度
🧩 词语组成解析
🗣️ 情景例句
I lost a whole day's work.
我丢掉一整天的工作成果。
It's been 5 years since I last saw you.
我已5年没见你了
They also hunted and killed wild animals.
他们还猎杀野兽。