Pentamethyl
五甲基
🗣️ 情景例句
Never chew with your mouth open.
嚼东西时别张着嘴。
One never loses by doing a good turn.
行善者决无一失。
He expected the assistant to look at him in blank astonishment.
他原想女售货员会惊奇地望着他，不知所措，