Preoiler
预先加油器, 预润滑器
🗣️ 情景例句
I must say the products in Shanghai have improved very much in the past ten years.
我得承认上海的产品这十年来进步了很多。
They had to call in a heart specialist.
他不得不请一位心脏病专家。
My shoe has been pressing against my foot, so it hurts a bit.
我的鞋一直挤着脚，所以脚有点疼。