Lassalite
甲坡缕石
🗣️ 情景例句
Always remember to wash your hands before eating.
用餐前谨记要洗手。
We can offer door-to-door delivery services.
我们可提供送货上门服务。
Then knowledge began to be accumulated according to a systematic plan.
于是，知识便开始有系统有计划地积累起来。