app 用

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

企

qǐ to plan a project; to stand on tiptoe; Taiwan pr. [qi4]; abbr. for 企業|企业[qi3 ye4]

加

jiā to add; plus; (used after an adverb such as 不, 大, 稍 etc, and before a disyllabic verb, to indicate that the action of the verb is applied to sth or sb previously mentioned); to apply (restrictions etc) to (sb); to give (support, consideration etc) to (sth)

Jiā abbr. for Canada 加拿大[Jia1 na2 da4]; surname Jia

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