Pdms
等离子体解吸质谱法
🗣️ 情景例句
Always remember to wash your hands before eating.
用餐前谨记要洗手。
Deeds,not words.
要行动，不要言词。
The next evening the man upstairs came home from work late as usual.
第二天晚上，楼上人和平时一样很晚才下班回家。