过敏原五花八门，并不是所有人都会对这些物质过敏，可一旦戴的防晒面罩里有你过敏的物质，就会引起接触性皮炎。一开始会皮肤发红、瘙痒、肿胀，炎症消退后出现色素沉着，脸就变“黑”了。

WASHINGTON, July 19 (Xinhua) -- U.S. President Donald Trump on Friday signed the Guiding and Establishing National Innovation for U.S. Stablecoins Act, or GENIUS Act, into law, marking the country's ...

WASHINGTON, July 19 (Xinhua) -- The U.S. government announced on Saturday new limits on Mexican flights, accusing Mexico of violating the bilateral air agreement on aviation access and fairness.