用盲板有渗漏的可能，还有就是时间长了，螺丝锈死，一样没用，保温管道还不是很方便保温。
Use blind boards are possible, and leakage for a long time, screw rust, as useless, insulated piping is not very convenient.
“没用的。”海蒂说，她的语气就好像她已经听天由命了一样。
"It's no use," Heidi said with such a tone as if she was resigned to her fate.
这些手表“还没用过，就跟新的一样”，虽未列出报价，但估计也都被贱卖。
The “unused as new” watches do not carry an asking price but it is expected they will go for a song.
这些手表“还没用过，就跟新的一样”，虽未列出报价，但估计也都被贱卖。
The "unused as new" watches do not carry an asking price but it is expected they will go for a song.
为了证明自己的努力，他拿出了新的商用车驾驶执照和调酒执照，然后把执照扔在了地下，就像甩扑克牌一样，因为它们已经没用了。
As proof of his efforts, he took out a new commercial driver's permit and a bartending license, and then threw them down on the ground like jokers, for all the use they'd been.
如果你使用一个没有用过或大约6小时没用的水龙头，首先要开着水龙头让水流出来，冲洗水管，直到水变得跟正常一样冷。
If you're using a faucet that hasn't been in use for the past 6 hour or some, first flush the piped by letting the cold water run until it's as cold as it will get.
也许对某些人(我的哥哥吃得跟猪一样，但是一直和狮子一样的健康)有用但是对我却没用。
It may work for some people (my brother eats like a pig but is as fit as a lion) but it definitely doesn't for me.
要么做一些与中文有关的事情，要么把它丢在书架上，就像那些在学校里学过但在后来的生活中根本没用过的科目一样。
Either do something with Chinese, or leave it on the shelf as one of those subjects you study in school but don't really use in later life.
葡萄树说她不能长得像松树一样粗壮，高大，而认为自己没用。
The vine said it couldn't grow tall and strong like the pine tree, so it saw no use in trying.
劝他是没用的，他非常固执，就像骡子一样。
你说法听起来好像这(指的是造炸弹)是在浪费钱一样。如果美国人真的需要火车，我们就会有。现在高铁对于我们国家的人民来说是没用的。
You make it sound like it "s wasted money. If Americans valued trains we would have them. They are inefficient for our country and the people."
你说法听起来好像这(指的是造炸弹)是在浪费钱一样。如果美国人真的需要火车，我们就会有。现在高铁对于我们国家的人民来说是没用的。
You make it sound like it "s wasted money. If Americans valued trains we would have them. They are inefficient for our country and the people."
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