Box2D is a simple physics engine with a broad use.
Box2D是一个简单却用途广泛的物理引擎。
Reason 3: a slide phone with a broad keypad that fits well with your hand.
理由3：手机为滑盖式，键盘宽大，非常适合你的手。
The most part of powder is spherical with a broad particle size distribution.
目前得到的粉末几乎都为球形，但颗粒粒径分布范围比较宽。
The most part of powder is spherical with a broad particle size distribution.
目前得到的粉末几乎都为球形，但颗粒粒径分布范围比较宽。
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