习惯用语be on tiptoe of excitement1.非常兴奋be on tiptoe with curiosity1.充满好奇心, 好奇得心里发痒be on the tiptoe of expectation1.殷切地期待; 翘首而望on tiptoe1.踮起脚尖2.迫切期待; 翘足盼望3.悄悄地; 谨慎地