Tetraborane
四硼烷
🗣️ 情景例句
Reading?
读书？
Necessity and opportunity may make a coward valiant.
需要和机会，可使懦夫变勇敢。
Both men had just begun to swim towards the shore, when they noticed with dismay that the speedboat was moving in a circle.
两个人刚开始向岸边游去，就突然惊愕地发现快艇正在转着圈行驶，