Tetraethide
四乙基金属
🗣️ 情景例句
She is a particular friend of mine.
她是我特殊的朋友。
She felt very awkward about the unpleasant situation.
她因不愉快的场面而感到十分困窘。
If they knew how difficult it was to drill through the hard rock, they would lose heart.
如果他们知道了钻透那坚硬的岩石有多么困难，他们会丧失信心的。