Less than: Every domino half in this space must add up to less than the number.
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居民会议有权撤销或者变更居民代表会议和居民委员会不适当的决定。居民代表会议有权撤销或者变更居民委员会不适当的决定。
Mr Lemmens said that future spacecraft "should be designed in such a way that they can take themselves out of orbit safely, preferably by doing controlled re-entries".