免费

miǎn fèi free (of charge)

智能

zhì néng intelligent; able; smart (phone, system, bomb etc)

SEO 收录

shōu lù to include (in a collection); to put together (stories, poems etc); to record; to employ; to recruit

工具

gōng jù tool; instrument; utensil; means (to achieve a goal etc)

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