Chalkography
金相學(xué)
??? 情景例句
She is giving me piano lessons in exchange for her English classes.
我教她英語，她教我彈鋼琴。
The flood has left many people homeless.
許多人因洪水而失去了家園。
People travelling long distances frequently have to decide whether they would prefer to go by land, sea, or air.
出遠(yuǎn)門的人常常需要決定是走旱路、水路，還是坐飛機(jī)。