They can be hard to reach for repairs and maintenance.
而且也难于修理和维护。
But some experts believe such a deal will be hard to reach.
一些专家相信这种交易很难达成。
Be willing to study and work hard to reach your goals.
要愿意学习，并且努力地去完成目标。
Work hard, and you will finally be able to reach your destination.
努力工作，你就能实现自己的目标。
It must be very hard to reach the top.
它必须很努力地飞到山顶。
It must be very hard to reach the top.
它必须很努力地飞到山顶。
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