Naphthenics
润滑油中粘度随温度急变的组分
🗣️ 情景例句
My car's in the shop.
我的车在修理店里。
The flight is delayed.
飞机晚点起飞。
I know.You must help me do the cooking this afternoon.
我知道。今天下午你得帮帮厨。