back pack

基本解釋

A high tech bomb disposal robot that fits into a back pack has been unveiled by the Ministry of Defence today.
英國國防部近日公佈了一臺(tái)可以裝進(jìn)背包裡的高科技拆彈機(jī)器人。
At the first inspection point the two cases and the back pack were removed from our car and X-rayed. Ian B followed the same process with his cases.
在第一個(gè)檢查點(diǎn)的兩起案件和背包被從我們的車和X光檢查。伊恩乙隨後與他的案件相同的過程。
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My back pack isn't very heavy because I only brought the necessities .
我的背包不會(huì)很重，因爲(wèi)我衹帶必需品。

The heavy pack on his back let him think of what he would do when he got home.
one of the soldiers said to Smith. "You'll never be able to walk all those miles with that heavy pack on your back."
Seth helped John pack his fur and traps so he could carried them on his back.

The car backs up, stops, and someone reaches out and grabs the back-pack the man had been carrying and they drive off.
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A backpack is a bag with straps that go over your shoulders, so that you can carry things on your back when you are walking or climbing.