科普

kē pǔ popular science; popularization of science; abbr. of 科學普及|科学普及

一下

yī xià (used after a verb) give it a go; to do (sth for a bit to give it a try); one time; once; in a while; all of a sudden; all at once

黄金

huáng jīn gold; golden (opportunity); prime (time)

城

chéng city walls; city; town; CL:座[zuo4],道[dao4],個|个[ge4]

登录

dēng lù to register; to log in

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]

百科

bǎi kē universal; encyclopedic; abbr. for 百科全書|百科全书[bai3 ke1 quan2 shu1]

地址

dì zhǐ address; CL:個|个[ge4]

：jj11net