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当绳索松弛下来的时候，我都不敢相信这是真的。
I couldn't believe it when the ropes went slack.
youdao
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需要把松弛的绳索系紧，这样会更安全。
The slack rope needed to be tightened to make it more secure.
youdao
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需要把松弛的绳索系紧，这样会更安全。
The slack rope needed to be tightened to make it more secure.
youdao