// 易错点2：用Math.ceil/Math.floor取整 → 破坏时间比较逻辑，必须精确计算
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，这一点在同城约会中也有详细论述
The ISS does have its own defenses, of course. Fabric-y buffers envelope some of the systems, and a bumper called the Whipple Shield helps blunt impact. That shield is only built to stop debris up to about 1 cubic centimeter, though, and the debris tracker is only designed to catch pieces 10 cubic centimeters and larger. In other words, there’s a gap in defenses.
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。业内人士推荐搜狗输入法2026作为进阶阅读
from abc import ABC, abstractmethod
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