Phenanthridinyl
菲啶基
🗣️ 情景例句
They're open until nine o'clock.
他们开到九点。
The concert will be held September 14 at 10 a.m.
该演奏会预定于9月14日10时举行。
Yes, and we must stop people walking on this floor until it's firm. It may be necessary to put up a notice saying Keep off. Another thing, we' ll have to drill a hole in the wall for the electric wires.
是的，因此在地板牢固前，我们必须防止人们从地板上行走。可能还需要竖一个布告牌，写上“不得践踏”。还有，我们必须在墙上钻一个电线孔。