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These cells are rare and so it's been hard to identify them, that's part of it.
这些细胞太少了,所以很难找到,这是原因之一
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and it's usually very difficult to get accommodation unless you book like six months in advance.
那时候通常很难找到住处，除非你提前六个月预订住所。
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And, in a rare moment of sort of personal self-reflection or self-reference, he notes somewhat drolly that the novelty of his ideas will make it difficult for them to find an audience.
虽然他很少对自己的思想,进行自我反思或自我参照，但他还是自嘲地写道,那些新奇的思想会让它们,很难找到读者。
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When you go into a restaurant now, unless you want to go look at a board on the wall or get a pamphlet that may be hard to find, or go to the website, it's going to be pretty hard to know what you're eating in those foods.
现在当我们去餐馆吃饭时,除非看一看墙上的菜单板,或者是去翻往往很难找到的宣传册,再或者去网站查看,否则很难知道,我们在进餐时到底摄入了些什么成分
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it's really competitive, and it's hard to find jobs through there.
竞争真的很激烈，通过那种途径是很难找到工作的。
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and, I think, hard to find from colleges around the world.
而且，我认为这些东西是很难从世界各地的其它大学找到的。
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Like America, you said it's hard to get job.
比如美国，你说过在那里很难找到工作。
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