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

瑞

ruì lucky; auspicious; propitious; rayl (acoustical unit)

丰

fēng abundant; plentiful; fertile; plump; great

Fēng surname Feng

fēng luxuriant; buxom; variant of 豐|丰[feng1]; variant of 風|风[feng1]; appearance; charm

乐

lè happy; cheerful; to laugh

yuè music

Lè surname Le

Yuè surname Yue

投

tóu to cast; to send; to throw oneself (into the river etc); to seek refuge; to place oneself into the hands of

letou 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]

进入

jìn rù to enter; to join; to go into

：jj11net