例句 /

If we take a polymer instead of a the common salt, say, polyvinyl alcohol, and add it to a fixed quantity of water, the polymer does not go into solution immediately.

详情正文

登录后查看完整内容

使用 DeepEvidence / 梅斯账号登录,新用户可在登录页面注册。

登录成功后将返回当前页面,继续浏览。