The launch of a ship was a big occasion.

船下水曾是一件大事。

《柯林斯英汉双解大词典》

The launch of a new ship is usually celebrated with champagne.

新船下水通常用香槟来庆祝。新船下水通常用香槟来庆祝。

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If they had a ship, they would launch out for fishing.

他们各自有一艘船的时候，他们就可以出海捕鱼了。

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If they had a ship, they would launch out for fishing.

他们各自有一艘船的时候，他们就可以出海捕鱼了。

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