原级：butterfly
第三人称单数：butterflies
第三人称复数：butterflies
过去分词：butterflied
过去式：butterflied
1. I had butterflying in my stomach when I went to see my boss this morning. 今天上午我去见老板时心里很紧张。
2. But you do have to remember by butterflying, you are cutting down the overall height of that root ball. 但是你必须记住，通过切瓣降低了球根系的整体高度。