He was returning to his demanding job as head of the WHO sub-office in South Darfur.

作为 世卫组织达尔富尔南部分办事处的负责人，他当时正要返回他在那里繁忙的工作岗位。

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He plans to add 100 in sub-Saharan Africa to the existing 300, using plain buildings and a regional back-office system to keep a lid on costs.

他计划在次撒哈拉非洲地区300家分行基础上再增加100家，用简单的建筑和区域性后勤办公室体系来限制成本。

youdao

And the major group of sub-health is the office workers, including high-tech personnel, senior intellectuals, medical treatment personnel, IT and media staff, traffic police, etc.

处于亚健康的主要人群是上班族，包括高科技人员、高级知识分子、医务人员、I T及媒体从业人员、交通警察等等。

youdao

The sub-post office is often the last business left in poor areas after other shops close.

ECONOMIST: Squeezing the banks

It was in the sub-sub basement of an office building there was a whole sophisticated world down there, but a plain one.

WSJ: Marcus Samuelsson on Traveling to Japan to Eat Fugu | Traveler's Tale

In addition to providing technical advice on the full range of education sub-sectors out of its Kabul Office, UNESCO implements large-scale literacy programmes for civilians and police officers in Afghanistan, with Japanese funding.

UNESCO: EDUCATION