正译：This kind of diapers is a disposable product.

解释：one-time 的意思是not to be repeated，即“不可重复的”。 one-time product的意思是“只买一次的产品”。而尿布是要连续用、连续买的用品。例如：当你订购一种杀毒软件时，你是在购买一种持续的服务，而不是一种只买一次的产品。When you pay for an anti-virus program subscription, you are buying a continuing service, not a one-time product.

他是一位常客，不仅仅是需要一种只买一次的产品。He is a repeat customer, who is not just in need of a one-time product.

有人将“一次性用品”译为a time sex thing，这种“字对字”的译法十分荒谬而不负责任。“一次性的”第一个意思是“用过后需要扔掉或处理的”，修饰日常用品。英语用 disposable, throwaway 或non-returnable等表示。例如：这位科学家正在研究如何回收利用一次性产品。The scientist is making a research on how to recycle disposable products.

护士给这位病人用一次性针管注射。The nurse gave the patient an injection with a disposable syringe.

垃圾必须装在一个一次性容器里带走。Waste must be brought in a non-returnable container.

“一次性的”第二个意思是“只发生或只做一次而不再重复”，常常与金钱有关。英语用 one-time, one-off, lump-sum 或non-recurring等表示。例如：如果你一次性付费500元，就不需要每月为升级付费了。If you pay a one-time fee of $500，no monthly fees will occur after the upgrade.

这个地方政府为扶贫工程提供一次性补助。The local government offers one-off grants for anti-poverty projects.

我们不想将这类一次性费用包括在这笔交易中。We do not want to include these kinds of non-recurring expenses in this transaction.

The Problems of Plastic Bags 一次性用品 disposable goods 一次性用品的利弊
参考范文

Plastic bags have found their way into a wide area of everyday life. They are applied in big supermarkets, ordinary shops, small stores and street markets. People put in plastic bags everything they buy. They no longer need to carry cloth bags, leather bags or basket bags with them when go shopping. Obviously it is very convenient for plastic bags to be used in people’s everyday life. They are also very cheap. They are usually offered free of charge.

However, plastic bags also bring us side effects. Some people throw away plastic bags causally. This causes the white pollution to our environment , which is very harmful because plastic bags can not disappear by natural decomposition. This is certainly not beneficial to our future.

People have to be careful with the use of plastic bags. They should make sure they put the sued plastic bags into the dustbin when they want to dispose of them. It also might be better for people to use the traditional cloth bags to hold the goods they buy instead of using plastic bags.hxw.red