Obcerse
n. 硬币正面
🗣️ 情景例句
Don't open the door if you don't know who it is.
如果有陌生人敲门不要开门。
Work today,for you know not how much you may be hindered tomrrow.
今朝有事今朝做，明朝可能阻碍多。
The enormous increase of population will create many problems.
巨大的人口增长将产生很多问题。