✔ 最佳答案
翻譯文章成英文:
The shark was a crowd of elasmobranchii fish's being generally called, this is a kind of ancient fingerling, when Jurassic Period already formed the modern type the shark, the shark body did not have the scale, the gill crack has 5-7. Each kind of between disparity is quite big, some meat, may swallow the seal, the sea turtle even person, some only eats the plankton; The big body long amounts to 20 meters, small only then several centimeters. Probably includes 5 item 20 branches (to classify scientist's opinion not not consistently), distributes in the world each place temperate zone and the tropics sea, but in the frigid zone survival shark, the common shark not too has not had the vigor in the 20℃ following water temperature.
Shark's reproduction all is the internal fertilization, has the viviparity, the ovo-viviparity or the egg lives, if is the egg lives the common egg all to have the protection cover.
Shark's sense organ is quite keen, has to the electric induction organ, may detect hides under the sand the game, in several kilometers beside sharks can smell the hemorrhage fishy smell.
China ancient times called the shark is “jiao”, thought is only Yu the Long large-scale aquatic biology, because his/her skin does not have the scale roughly, similar sandpaper, therefore is called the shark. English name originates from Masurium correct language xoc, originally in Atlantic the east coast only then the small shark, English is called “the pike”, until only then discovers the large-scale shark in the Caribbean Sea, therefore uses local Masurium Yaren the vocabulary.
The shark is injured cannot receive the bacterium infection, this arouses many biologist's interests, the idea is withdrawing the shark in vivo antibacterial matter, manufactures the new medicine.