The greatest concern the authors raise is space debris—pieces of "junk" that orbit the earth, with the potential to cause serious damage if they collide with operational units, including the ISS.
作者提出的最大担忧是太空碎片，即环绕地球的“垃圾”碎片，如果它们与包括国际空间站在内的运行体相撞，将有可能造成严重损害。
The greatest concern the authors raise is space debris-pieces of "junk" that orbit the earth, with the potential to cause serious damage if they collide with operational units, including the ISS.
两位作者提出的最大担忧是太空垃圾——环绕地球运行的“垃圾”碎片，如果它们与包括国际空间站在内的运行单位相撞，可能会造成严重损害。
If the tiniest piece of junk crashed into a spaceship, it could damage the vehicle.
即使是最微小的一块废品撞到宇宙飞船上，也会损坏飞船。
The junk was of unknown size but experts say even a small object could do considerbale damage to the ISS.
这块残骸的大小是未知的，但是专家说，即使是一个小物体也会给国际空间站带来巨大的伤害。
Junk food makes people get fat and damage to their bodies.
垃圾食品让人变胖，损害身体。
Junk food makes people get fat and damage to their bodies.
垃圾食品让人变胖，损害身体。
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