但即使是清洁班最小的成员都比它们后面的挖掘机挖得快，所以科学家们到最后总是会放弃，离开。
Even the smallest ones could dig much faster than the machines could dig after them, so the scientists always gave up finally and went away.
但即使是清洁班最小的成员都比它们后面的挖掘机挖得快，所以科学家们到最后总是会放弃，离开。
Even the smallest ones could dig much faster than the machines could dig after them, so the scientists always gave up finally and went away.
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