acentric fragment是什么意思

用法例句

Vagrants and beggardom have changed from quantity to the quantity since "the salvage and manage way to the vagrants and beggardom in cities" issuing for enforcement.

《城市生活无着的流浪乞讨人员救助管理办法》实施以来,流浪乞讨人员从数量到质量都发生了很大的变化。