The Salk vaccine is a major factor in the fight to eradicate polio.
A、completelydestroyA
暫無解析
Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
Somecosmeticsmanufacturersattempttocapturetherose'sunmistakablefragrance香味insoapsandperfumes.
Eyespots, the most rudimentary eyes, are found in protozoan原生動物 flagellates 鞭毛蟲 , flatworms 扁形蟲 , and segmented worms片段 蠕蟲 .
The company issues an annual report every March.
Some children display an unquenchable 難以抑制的 curiosity about every new thing they encounter.
