Pentrite
[化] 四硝基赤藓醇
🗣️ 情景例句
Just a moment, please.
请稍侯。
The world is a ladder for some to go up and some down.
人间犹如一架梯，有人缘梯上升，有人顺梯下降。
Half an hour? That's too long! Is there a bus?
半小时？那太久了！有公共汽车吗？