embark on: to start a new project or activity, usually one that will be difficult and will take time

翻译

他即将开始新的职业生涯，做一位硬核说唱歌手。
He is about to embark on a new career as a hardcore rapper.

造句

句子： Having made a down payment, he embarked on a long journey of paying back the mortgage.
翻译： 付完了房子的首付，他走上了漫漫还贷路。
背景： 仿佛看到了未来成为房奴的自己……

句子： After so many instances of serious juvenile crimes, the government eventually embarked on another revision of The Law on the Protection of Minors.
翻译： 在多起严重的青少年犯罪发生之后，政府终于着手再次修订《未成年人保护法》了。
背景： 希望今年的修订能让这部法律更加完善吧。