You to compare the wet ground can be covered with an O-level kids play the kind of plastic building blocks, very cheap.

您比较湿地可以覆盖一O级孩子们玩的一种塑料积木，非常便宜。

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O. p as a method for PC programming. The PC program blocks consist of data dealing block, interface block, control adjusting block, system safe block.

上位机软件开发采用可视化编程软件，利用面向对象的开发思想方法设计，程序包含数据处理、界面显示、控制调整、系统安全等模块。

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C.O.P.D.,chronic obstructive pulmonary disease, blocks airflow through the lungs.

VOA: special.2009.06.03

The 4 o'clock spot is a Master button (for saving settings and quickly returning the center dial to its main volume control), and 6 o'clock features a half-dozen blocks that correspond to your virtual surround speakers.

ENGADGET: Turtle Beach XP Seven Series headset review: a new era of tournament-grade gaming audio