Packless
[化] 未包装的; 无填充的; 无填料的
🗣️ 情景例句
I think I can swing that.
我想我能办到这点。
How could you do this?
怎么可以这样？
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。