天空没有留下鸟的痕迹，但我已飞过
——泰戈尔
There are no trails of the birds in the sky， but I have flied away.
<script id="enContentLoader">
window.fkp = "d2luZG93Lm9ua2V5Zm9jdXMoIkRRQWNwR3VJSTdMb1lYSlNnR3NQZVMxN2R0VUh0MVJoOTh5R1B3ZThaWXBKMDJ1K3ZPbzNpd1FYSjZPdFVFUUpWN01Edks4VWFRRHAvS29hWnF1UUpNdkhEWVlPNmFLQWVhNHRkUURiVFY4cmNqWjZ4Sy9vYTl4a1hiRjZ6czN3IiwgMTYzMjI3OTEyMyk=";