Velocitron
质谱仪
🗣️ 情景例句
Could you knead the dough for me?
你能帮我揉面吗？
There isn't much room for doubt in this matter.
关于这件事，不大有质疑余地。
Gifts poured in not only from unknown people, but room baby food and soap manufacturers who wished to advertise their products.
不但素昧平生的人寄来了大量的礼物，而且婴儿食品、婴儿肥皂制造厂商为了替自己产品做广告也寄来了大量的礼物。