Understoke
自下给(燃)料, 底部给煤
🗣️ 情景例句
Nothing much.
没什么要紧的事。
Ouch! I fell down and cut my knee!
好痛呦！我跌倒割伤了膝盖！
so it will soon be sending up four astronauts to repair it.
为此将把4名宇航员送入太空修复望远镜。