Eyespots, the most rudimentary eyes, are found in protozoan原生动物 flagellates 鞭毛虫 , flatworms 扁形虫 , and segmented worms片段 蠕虫 .

TheeconomyofDallas,Texas,isstronganddiversified.

The Native American interpreter Sacajawea was a valuable member of the Lewis and dark expedition in 1805.

Somechildrendisplayanunquenchable难以抑制的curiosityabouteverynewthingtheyencounter.

While Billie Holiday did not invent the music called "the blues", she most assuredly helped popularize it.