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Objects have a class, and a fixed size based on their class.
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几乎所有关于新 i3 的官方描述中，都在反复强调一个核心卖点：它的动态表现将无限贴近经典燃油 3 系的驾驶体验。
A Vermont crossing guard has quietly turned her observations into a surprisingly lucrative one-woman publishing business, earning about $14,000 a month, The Wall Street Journal reported.
sqrt(a) * (u * radical - v * log(0.001f + u + radical));