跷 lift up (a leg)
stilts
hold up (a finger)
on tiptoe
- 她跷着脚走到孩子的床边。
- 跷着脚我刚能够着那个架子。
I can just reach the shelf. - 所以,加拿大和北方五大湖在慢慢的上升,而北美的其他部分在慢慢下沉,像一个跷跷板,让地幔往北部跷。
So the land in Canada and the northern Great Lakes is slowly rising, while the rest of North America is slowly sinking, like a seesaw, enabling the mantle to flow back north.