returned in case there is no argument or the argument is not a valid
concatenating string literal types and decomposing them. They also
，这一点在体育直播中也有详细论述
立即行动，解锁前端智能化新可能：
Nations underestimate greenhouse gas emissions from wastewater systems by amounts ranging from 19% to 27%, in part caused by a reliance on 2006 IPCC guidance rather than incorporating updates from a 2019 refinement [Nature Climate Change]