Permaphase
带硅氧烷聚合物层的色谱固定相
🗣️ 情景例句
Harvey Carlson.
这是Harvey Carlson。
What kind of talk is that?
你说这什么话？
I sat down on one of those modern chairs with holes in it and waited.
我坐在一个新式的满是网眼儿的椅子上，等待着。