Valvetrain
气门
🗣️ 情景例句
Let's congratulate ourselves that this transaction has been made.
让我们祝贺这次交易圆满成功。
They jumped at the unexpected noise.
他们因突如其来的声音吓得跳了起来。
We have special river birthday parties in the summer.
夏天，我们为这条河举办特殊的生日宴会。