Chromene
[化] 色烯; 苯并吡喃
🗣️ 情景例句
I hope it isn't important.
希望不是什么重要事。
The telephone is ringing,would you answer it,please?
电话正在响,你接吗？
The editor at once sent the journalist a fax instructing him find out the exact number of steps and the height of the wall.
”编辑立即给那位记者发去传真，要求他核实一下台阶的确切数字和围墙的高度。