be formed of:由……组成;由……构成(强调材料、成分或结构,常用于被动表达)。
(类似表达还有 be made of / be composed of / consist of,语气与搭配略有不同。)
/bi fɔːrmd əv/
The committee is formed of five members.
委员会由五名成员组成。
The necklace, formed of tiny glass beads and silver links, was passed down through three generations.
这条项链由细小的玻璃珠和银链构成,传承了三代。
formed 来自动词 form(形成、构成),源于拉丁语 formare(塑造、使成形),与 forma(形状、形态)相关。be formed of 是一种常见的被动结构,用来说明“某物的构成材料/成分/要素”。