Heptasulfide
七硫化物
🗣️ 情景例句
A construction company. Roads, bridges, big stuff.
一家建筑公司。修路， 筑桥， 都是大工程。
As a sign of friendship, Gordon and Peter clasped hands.
为了象征友谊，高顿和彼德互相握手。
Sophie, this is Hans.He is German.
索菲娅，这位是汉斯。他是德国人。