Tribology
n. 摩擦學(xué)
??? 情景例句
It's hard to say. I like volleyball a lot, but I guess I like tennis better.
很難說(shuō)，我喜歡排球，但我想我比較喜歡網(wǎng)球。
He has a sweeter.
他有一件毛衣。
He talks as if he were the head of the office.
他說(shuō)話(huà)的口氣像辦公室主任似的。