apk 用

yòng to use; to employ; to have to; to eat or drink; expense or outlay; usefulness; hence; therefore

加固

jiā gù to reinforce (a structure); to strengthen

安卓

Ān zhuó Android (operating system for mobile devices)

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

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