Preconcentrator
[化] 預濃縮器
??? 情景例句
I am looking for a necklace with a matching pair of earrings.
我想找一條項鏈和一副跟它相配的耳環。
How is it going with you?
你過得怎樣？
A child ran into the street and knocked her off her bicycle.
一個孩子沖上馬路，把她從車上撞了下來。