Mr Lemmens explained that the "re-entry of human-made objects into Earth's atmosphere occurs quite frequently". He said it happens weekly for bigger spacecraft and daily for smaller ones.
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知情人士表示，相关考虑仍在进行中，细节可能发生变化，SpaceX也仍可能推迟递交文件。
For these smaller computers, IBM reasoned that they needed to offer peripherals