1. 翘首以待：on the spur of the moment 一时冲动 | on tiptoe 翘首以待 | The on-looker sees most of the game. 旁观者清
2. 踮脚：on time 按期 | on tiptoe 踮脚 | on top of the world 幸福到极点
3. 蹑手蹑脚：49.商业领域 commercial fields | 50.蹑手蹑脚 on tiptoe | 51.小心翼翼 with great care
4. 用脚趾走：9. 同时 at the same time | 10.用脚趾走 on tiptoe | 11.没有闪电 without lightning
1. The stilts require the actresses to stand and dance on tiptoe, an art form no less difficult than ballet.