A toddler requires close supervision and firm control at all times.

刚学步的孩子时刻需要寸步不离的照看，并要牢牢看紧。

The plan calls for a ceasefire and UN supervision of the country.

该计划要求双方停火并由联合国对该国进行监督。

First-time licence holders have to work under supervision.

首次取得许可证的人员必须在监督之下工作。