if celsius < 20.0 {
alloc.c — allocating and garbage-collecting Lisp objects。关于这个话题，新收录的资料提供了深入分析
，这一点在新收录的资料中也有详细论述
[&:first-child]:overflow-hidden [&:first-child]:max-h-full"，详情可参考新收录的资料
:first-child]:h-full [&:first-child]:w-full [&:first-child]:mb-0 [&:first-child]:rounded-[inherit] h-full w-full