一外壳(30)封闭开口(18)并包围柱塞(25)的内部，由此在泵本体(11)和外壳(30)间限定一增压室(33)。

A sheath (30) closes the opening (18) and embraces an inner portion of the plunger (25), whereby pumping chamber (33) is defined between the pump body (11) and the sheath (30).

youdao

比如，如果要在服务器间调用(HTML链接)，则每台服务器都应该有对方的完全限定链接(全局属性)。

For example, by making calls (HTML links) between servers, each server should have fully qualified links to the other (global properties).

youdao

Path正尝试重新定义这个词，并将添加朋友的上限定位50，鼓励用户只在真正的朋友间分享。

Path is trying to redefine this by limiting the number of friends you can add to 50, encouraging you to only share with your “real friends.”

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