Roy Tam says to YSITD
dropbox正常了。 ```` www.dropbox.com. 60 IN CNAME www.v.dropbox.com. dropbox.com. 172800 IN NS ns-1162.awsdns-17.org. dropbox.com. 172800 IN NS ns-1949.awsdns-51.co.uk. dropbox.com. 172800 IN NS ns-315.awsdns-39.com. dropbox.com. 172800 IN NS ns-564.awsdns-06.net. ;; Received 190 bytes from 2600:9000:5302:3400::1#53(ns-564.awsdns-06.net) in 164 ms ````