Stm
[化] 扫描隧道显微镜
🗣️ 情景例句
Three months ago.
三个月之前。
She hesitated about what to do next.
他对下一步干什么拿不定主意。
After his attempt, Campbell was disappointed to learn that his average speed had been 299 miles per hour.
比赛结束后，坎贝尔非常失望地得知他的平均时速是299英里。