每七年一次的

According to the UN, a Congolese person manages on average to get access to health care once in seven years.

据联合国统计，刚果人人均得到医疗保险的机率是每七年一次。

Article 47 The Senate shall elect once every six years a President Pro Tempore who shall preside in the absence of the President of the Senate, and such other officers as shall ensure the proper functioning of the Senate.

第四十七条：参议院每6年选举一次临时议长，和其他官员一起负责在参议长缺席的时候保障参议院的正常运作。

For example: don't commit to cooking a seven-course Christmas dinner for fourteen people all by yourself; don't accept every holiday party invitation that you receive when you'd rather spend some alone time with your spouse; and don't feel that you have to get a present for your cousin three times removed whom you haven't seen in the past five years.

举例：不要认为凭一个人的能力就可以为14个人准备一次七道大餐的圣诞晚餐；当你想和你的配偶单独共度一些时光的时候，不要接受收到的每一场节日派对的邀请；不要觉得你一定要为曾今三次搬迁并五年不见的表兄妹买一份礼物。

The SeaWiFS will be the first ocean color satellite to follow the Nimbus-7 Coastal Zone Color Scanner, which ceased sending dataa in 1986 after more than seven years of operation.

宽视场海洋观测传感器是继工作了七年多，于1985年停止发送资料的Nimbus－7海岸带水色扫描仪之后的第一个星载海洋水色传感器，不像作为概念验证性实验的海岸带水色扫描仪那样，宽视场海洋观测传感器被设计用来提供充分精确的光合色素浓度资料以进行海洋初级生产力和生物地球化学定量研究［4］。宽视场海洋观测传感器将常规地每二日一次提供全球复盖资料。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。