Definition
to begin or engage actively in a particular activity or task
開始某事；著手從事某事
In this new project, we need to enter upon market research.
在這個新項目中，我們需要著手進行市場調查。
She decided to enter on learning French to venture into this challenging new field.
她決定開始學習法語，以進入這個充滿挑戰的新領域。
We will enter upon this environmental program next year, and we can't wait to get started.
我們將於明年開始這個環境計劃，我們迫不及待地想要開始。