| 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 |
| 价格 | jià gé | price; CL:個|个[ge4] |
| 最优 | zuì yōu | optimal; optimum |
| 的 | de | of; ~'s (possessive particle); (used after an attribute); (used to form a nominal expression); (used at the end of a declarative sentence for emphasis) |
| dí | really and truly | |
| dì | aim; clear | |
| dī | see 的士[di1 shi4] | |
| 狗 | gǒu | dog; CL:隻|只[zhi1],條|条[tiao2] |
| 狗 | gǒu | dog; CL:隻|只[zhi1],條|条[tiao2] |
| 免费 | miǎn fèi | free (of charge) |
| 社工 | shè gōng | social work; social worker |
| 站 | zhàn | station; to stand; to halt; to stop; branch of a company or organization; website |
| 社工 | shè gōng | social work; social worker |
| 库 | kù | warehouse; storehouse; (file) library |