The extra payments are a lifeline for most single mothers.

额外补助对大多数单身母亲来说都是赖以生存的生命线。

《牛津词典》

Extra payments should be made to protect the interests of the staff and prevent exploitation.

额外报酬应被支付以维护员工的利益和防止剥削。

《柯林斯英汉双解大词典》

Despite support from MPs, and the British embassy in Moscow, officials demanded extra payments and paperwork.

BBC: Customs row puts charity fire engine into reverse

You can always make extra payments if you want to pay the loan off sooner.

FORBES: 7 Steps to Buying a Home You Can Actually Afford

The extra payments will vary according to salary bands and the section of the scheme the officers are in.

BBC: Police officers (unidentified)