Monobel
单贝尔(硝铵、硝酸甘油、锯屑、食盐炸药)
🗣️ 情景例句
with the school-board committee.
与联合校董会有关。
It is never too late to mend.
亡羊补牢，犹为未晚。
His previous attempts had been unsuccessful.
他以前的尝试没有成功。