古希腊德尔斐神庙上刻着一句著名的神谕：「认识你自己（Know Thyself）」。我们阅读古老神话的意义，正是为了在冰冷的数据洪流中「认出自己」。
The US president criticised the Spanish government after it blocked the US from using its bases during the attack on Iran.，更多细节参见新收录的资料
。业内人士推荐新收录的资料作为进阶阅读
I know, the idea of an inert table pushing up on a book doesn’t seem very normal. Maybe it’ll help if you realize that gravity doesn’t pull you to Earth’s surface, as people often think—it pulls you to the center of the Earth. The normal force is what keeps you from plunging through the floor. (By the way, “normal” means perpendicular—it’s always perpendicular to the surface.)，更多细节参见新收录的资料
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