In 2007, Steven P. Jobs stood on a stage in front of hundreds of technology reporters and presented the iPhone, Apple's latest foray into electronics.
2007年,Steven p . Jobs面对数百名技术记者,站在台上介绍Apple的最新电子产品iPhone。
If you have an important meeting scheduled for 4 p. m., it's easy for anxiety to set in and keep that meeting at the front of your mind.
如果你把重要的会议放在下午4点,你会很容易焦虑,因为这之前你会一直想着它。
If you imagine yourself tossing a ball in the air in front of a mirror, P symmetry seems intuitively obvious.
想像如果你在镜子前面丢球,P对称看来是无庸置疑的。
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