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.

youdao

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.

youdao

这种做法在那些刚刚开始创业的人群中非常流行，因为租用办公室、添置家俱以及雇人保洁都是一笔一定的数目价不低的支出。

The arrangement is particularly popular among those just starting out since leasing a commercial space, outfitting it with furniture and keeping it clean can be costly.

youdao

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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