translation.en: So no surprises then that the proportion that actually used clean needles every time they injected in the last week is just about one in 10, and the other nine in 10 are sharing.
translation.zh: 所以也难怪 在上周每次注射时真正 使用干净针头的比例 只有十分之一。 另外十分之九共用一个针头。