He used a hammer and chisel to chip away at the wall.他用榔头和凿子铲墙。This chisel is useful for getting into awkward spaces.这凿子在要伸入到犄角儿里时十分有用.This will answer for a chisel.这东西可以当凿子用....
Nanomedicine isn't just about getting fid of the bad -- it's about enhancing the good.纳米医学不只是为了摆脱医学 弊病,还在于提高它的优越之处.The result obtained by TCD was consistent with that obtained by FID.TCD检测器的测定结果与商用火焰离子化检则器(FID)...