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.
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