Iec
[化] 离子交换色谱法
🗣️ 情景例句
and I do mean welcome home.
我真心欢迎你们回来。
I imagine you are tried after your trip.
我想你旅行回来一定疲惫不堪吧。
Since that time, racing drivers have reached speeds over 600 miles an hour.
从那时以来，赛车选手已达到每小时600英里的速度。