我们用表达 “sink one’s teeth into something（用力地啃咬某物）” 来表示 “全身心地投入或全神贯注于一项活动”。它也可以被用来描述某人积极的工作热情。这个表达也可以用作 “get one’s teeth into something”，意思不变。

• My son seemed really bored – so I gave him a video game he could really sink his teeth into.
  我儿子当时看起来很无聊，所以我给了他一部能让他埋头专心玩的电子游戏。
• She’s really sunk her teeth into this project. She's almost obsessed with getting it done!
  她为这个项目投入了很大的精力。她一心想要完成它！
• My students really got their teeth into this project-based learning activity.
  我的学生们真的全身心地投入了这种专题导向的学习活动。