apk 防

fáng to protect; to defend; to guard against; to prevent

反

fǎn contrary; in reverse; inside out or upside down; to reverse; to return; to oppose; opposite; against; anti-; to rebel; to use analogy; instead; abbr. for 反切[fan3 qie4] phonetic system

TG:【apkyt9】 安卓

Ān zhuó Android (operating system for mobile devices)

加固

jiā gù to reinforce (a structure); to strengthen

信

xìn letter; mail; CL:封[feng1]; to trust; to believe; to profess faith in; truthful; confidence; trust; at will; at random

合作

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

bym