Permaphase
帶硅氧烷聚合物層的色譜固定相
??? 情景例句
Are you Mr. Chen?
你是陳先生嗎？
Now that you are pretty well again, you should work harder.
你的身體既然已經(jīng)完全康復(fù)，你就應(yīng)該更加努力工作。
It's about four hundred yards down this street.
城堡就在這條街上，（離這兒）400碼左右。