Four spotters must be positioned a trampoline while it is in use.
當(dāng)彈網(wǎng)正被使用時(shí),必須有四位保護(hù)員包圍著彈網(wǎng),以作保護(hù).
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Or maybe it would turn a profit by selling seats exclusively to train - spotters.
或者,它將通過專門向火車迷售票而獲利?
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