Dicovalent carbon
[机] 二价碳
🧩 词语组成解析
🗣️ 情景例句
Are we picking him up at the station?
我们要去车站接他吗？
How people design computer games is beyond me.
我不懂得电脑游戏是怎么设计的。
Once there was an old tiger.
从前有一只年迈的老虎。