Concentration gradiant
[电] 浓度梯度
🧩 词语组成解析
🗣️ 情景例句
Sign here, where I've indicated.
签在这里，在我指的地方。
He turned white with amazement.
他害怕得脸都苍白了。
Before it could be transported to the United States, a site had to be found for it and a pedestal had to be built.
在雕像被运往美国之前，必须为它选好一块场地，同时必须建造一个基座。