1.close up 關閉；愈合；靠近

Do not close up your heart.
不要把你的心關起。

Or will you close up like a shell and torture your partner with inconsolable silence?
或者你會像個貝殼那樣關閉自己用極度沮喪的沉默折磨你的情人？

2.wrap up 包裹；圓滿完成

Use a cloth to wrap up the wound.
用布把傷口包起來。

You should wrap up your neck in this cold weather.
在這樣的冷天里，你應把脖子圍起來。
3.pack into 擠進…里；塞進

According to the conventional view, liquid water has a similar, albeitless rigid, structure, in which extra molecules can pack into some ofthe open gaps in the tetrahedral arrangement.
根據傳統觀點，液態的水分子也是類似排列，盡管不那么嚴格，額外的分子會被包進四面體孔隙里。

PolyPlus's battery may be just that: Dip the encapsulated lithium pack into a glass of ordinary water and it produces current that lights up an LED display at the company's conference showcase booth.
而 PolyPlus 電池也許就是這樣一種新技術：把密封包裝好的鋰浸入一罐普通的水中就能產生電流，可將公司展會展位上的LED燈點亮。

4.immune system 免疫系統

The immune system then kicks in, and the body and the virus wage all-out war.
此后，免疫系統開始發揮作用，身體與病毒之間的戰爭由此全面爆發。

Aids, he said, was brought about by the collapse of the immune system-but not because of a virus.
他說，艾滋病是免疫系統的崩潰所帶來的，而不是一位某種病毒帶來的。