Heptasulfide
七硫化物
🗣️ 情景例句
You made a favorable impression on the examiners.
你给主考留下了很好的印象。
The crates are charge to you at $5 each if they are not returned to us within 2 weeks.
如果木条箱两星期内不归还，则每只箱扣罚五美元。
I stopped to let the car cool off and to study the map.
我停下车，让汽车发动机冷却一下，同时查看一下地图。