embark

我们将在下午三点登上飞往巴黎的航班。

We will ___embark on the flight to Paris at 3 pm.

他们决定开始一项新的环保项目。

They decided to ___embark on a new environmental project.

他们即将开始一项环保倡议。

They are about to ___embark on an environmental initiative.