that's because only then ,will the weather be warm enough for a ship to be able to sail to the area .这是什么句子那么奇怪!

that's because only then ,will the weather be warm enough for a ship to be able to sail to the area .这是什么句子那么奇怪!
that's because only then ,will the weather be warm enough for a ship to be able to sail to the area .这是什么句子那么奇怪!

that's because only then ,will the weather be warm enough for a ship to be able to sail to the area .这是什么句子那么奇怪!
only引导的倒装句

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