Els
[化] 电泳光散射; 电子能量损失能谱; 电子能量损失能谱学
🗣️ 情景例句
Where's the ticket counter?
售票处在哪儿？
Would you speak a little louder?
请你说大声一点好吗？
How would you go to Beijing, by air or by train?
你怎样去北京，是乘飞机还是坐火车？