The misconceptions in estimation concept of circle due to visualization, insufficientquantity sense etc.
在圆估测的迷思概念上，主要是儿童对量感不足，而导致视觉估测错误。
2
Although having varied supply mode, there still exist problems of insufficientquantity and unreasonable supply structure.
我国城市准公共物品的供给方式已多样化，但仍存在总量供给不足和供给结构不合理等现象。
3
Common reasons include: insufficientquantity of flash or ram, device is based on a platform with no Linux support, device is too old to be worth the effort.