换

huàn to exchange; to change (clothes etc); to substitute; to switch; to convert (currency)

机

jī machine; engine; opportunity; intention; aircraft; pivot; crucial point; flexible (quick-witted); organic; CL:臺|台[tai2]

Jī surname Ji

克隆

kè lóng clone (loanword)

官方

guān fāng government; official (approved or issued by an authority)

免费

miǎn fèi free (of charge)

下载

xià zǎi to download; also pr. [xia4 zai4]

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