好用

hǎo yòng useful; serviceable; effective; handy; easy to use

tf 签名

qiān míng to sign (one's name with a pen etc); to autograph; signature

长期

cháng qī long term; long time; long range (of a forecast)

合作

hé zuò to cooperate; to collaborate; to work together; cooperation; CL:個|个[ge4]

TGtfzhihu iOSTF 签名

qiān míng to sign (one's name with a pen etc); to autograph; signature

ynj