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1·The computer was my largest single item of expenditure.

电脑是我花钱最多的一件东西。《牛津词典》

2·The strategy of those funding research to accept publishing costs as a fixed item of research expenditure mitigates this problem.

研究资助者提出的策略，是把出版费用视为研究费用的固定项目，有效地纾解此问题。

3·They raise a requirement, if I fill in correctly, give the information that registers time, can help me open proof of date of enter an item of expenditure in the accounts.

他们提出一个条件，假如我能正确地填写出注册时候的信息，就能帮我开出账号证实。