MEXICO CITY, Feb. 3 (Xinhua) -- Mexican President Claudia Sheinbaum on Monday said she had reached an agreement with her U.S. counterpart Donald Trump to put a month-long "pause" on imposing a ...

索尔克认为，多数人把婴儿抱在左边， 是因为人类心脏在胸部略偏左的位置。 婴儿被抱在左边时，更容易听到父母的心跳声并因此安稳下来，这让父母安抚婴儿更加容易，所以偏好左侧。