组织这家新的合资企业是一项复杂的计划，需要周密的规划。

Organising the new joint venture was a complex ___enterprise requiring detailed planning.

该慈善机构最新的人道主义计划旨在为整个地区提供清洁用水。

The charity's latest humanitarian ___enterprise aims to provide clean water to an entire region.

绘制人类大脑图谱是我们这个时代最雄心勃勃的科学计划之一。

Mapping the human brain is one of the most ambitious scientific ___enterprises of our time.