float upward的用法和樣例：
例句
- Through hundreds of thousands of years, it has become so salty that salt crusts float upon it like ice.
經(jīng)過(guò)千百萬(wàn)年之后，其含鹽度變得極大，以至湖上浮著(zhù)一層浮冰一樣的鹽殼。 - At sunset, long grasses crowned with white flowers invite moonlight to float in their waves.
黃昏的時(shí)候，長(cháng)草頂著(zhù)白花，邀月光在長(cháng)草的波浪上浮游。
