Naphthenics
润滑油中粘度随温度急变的组分
🗣️ 情景例句
There is still a week to go before the vacation begins.
现在距离假期还有一星期。
A smooth sea never made a skillful mariner.
平静的海洋练不出熟练的水手。
We give a 2% discount for cash.
付现的话折扣2%。