// 1. 将当日价格存入数组，记录当前索引（i是当前价格在arr中的位置）
Xperia NXP UI与Holo Design的对比：https://www.xperiablog.net/2014/01/15/user-interfaces-compared-stock-android-versus-sony-xperia/
，详情可参考新收录的资料
It furthermore provides primitives for data transformations on arbitrary-sized arrays like these:
for s in students {