Where do we find the material strong enough yet lightweight enough to act as a cable or track?

我们在哪里可以找到足够坚固且足够轻的材料来充当电缆或轨道呢？

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There are now about 22, 000 pieces of material in orbit that are big enough to track from the ground, and many more too small to track but also capable of damaging working satellites.

目前轨道中约有22000片大到足以从地面追踪的碎片，和更多太小以致无法追踪、但仍有毁坏正常工作卫星能力的碎片。

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As Skinner raps in "Let's Push Things Forward," a track from "Original Pirate Material," his debut album: "Let's put on our classics and have a little dance, shall we?"

史金那源自于“原始海盗”的单曲“让我们向前”收录于他的首次推出的专辑“让我们穿上经典，跳一小段舞，可以吗？”

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And chemists who understand how plutonium ages also develop forensics to track missing nuclear material and catch those trafficking in it.

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Food inspectors, air-traffic controllers, specialists who track down loose nuclear material wouldn't get their paychecks.

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He first stops at the track, refurbished with synthetic material.

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