一定的数目
双语例句原声例句
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某些项目抵扣，例如医疗或者雇佣相关的费用，只有当它们超过一定的数目时才可以抵减。
Certain itemized deductions, such as medical or employment related expenses, are only deductible if they exceed a certain amount.
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无论是动物还是植物，其细胞核内的染色体，不仅具有一定的数目，而且还有一定的形状。
No matter what plant or animal, the chromosome in its karyon has a certain number and shape.
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处于早期阶段的果蝇神经细胞不一定了解周围细胞的数目，但是他们能够发育成合理分布的感觉硬毛。
Young fruit fly nerve cells don't necessarily know how many cells are in their neighborhood, yet they manage to develop into appropriately distributed sensory bristles.
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You pay every year a fixed amount on your house to the mortgage originator and then after so many-- n is 30 years, typically--you would then have paid it off.
你每年都在你的房子上支付一定数目的偿款,给抵押商然后,数年后,设n是30年,一般来说你已经能偿清贷款了
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