Preoiler
预先加油器, 预润滑器
🗣️ 情景例句
Second, we have to make an effort to encourage American companies to do business in our country.
第二，我们必须鼓励美国公司在我国开展业务。
A little spark kindles a great fire.
星星之火，可以燎原。
No,you mustn't eat anything until you see the doctor.
不行，看医生之前你不可以吃任何东西。