安全

ān quán safe; secure; safety; security

查询

chá xún to check; to inquire; to consult (a document etc); inquiry; query

某人

mǒu rén someone; a certain person; some people; I (self-address after one's surname)

行为

xíng wéi action; conduct; behavior; activity

轨迹

guǐ jì locus; orbit; trajectory; track

。24 小时

xiǎo shí hour; CL:個|个[ge4]

在线

zài xiàn online

有偿

yǒu cháng paying; paid (not free)

服务

fú wù to serve; service; CL:項|项[xiang4]

项目

xiàng mù item; project; (sports) event; CL:個|个[ge4]

大陆

Dà lù mainland China (reference to the PRC)

dà lù continent; mainland; CL:個|个[ge4],塊|块[kuai4]

社工

shè gōng social work; social worker

库

kù warehouse; storehouse; (file) library

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