作业帮英语作文文 某动物简介
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/24 19:44:09
英语作文文 某动物简介
短短的、简单一点 60个单词差不多了 在 线等哦、
短短的、简单一点 60个单词差不多了 在 线等哦、
There are at least 40 species of dolphins.Dolphins resemble fish in many ways,but they exhibit a number of true mammalian characteristics:They are warm-blooded,breathe air,and nurse their young on milk.Dolphins and porpoises have a similar appearance,but dolphins can be distinguished from porpoises by their more prominent snouts and conical teeth.
Dolphins range in size from the small tucuxi dolphin,which grows to about 1.2 m (4 ft) in length and weighs about 50 kg (110 lb),to the killer whale,which can grow to 9.8 m (32 ft) in length and weigh over 5,500 kg (12,100 lb).In most dolphins males grow slightly larger than females
Dolphins are commonly black,brown,or gray in color and are often marked with patterns of white or light colors.
Dolphins throughout the world are threatened by habitat destruction and pollution.During the 18th and 19th centuries dolphins were hunted commercially,especially for the small quantity of valuable oil in parts of the head.This oil was used to lubricate delicate watch mechanisms; cheaper oils have now been found from other sources.Today dolphins are less often hunted,although some cultures continue to take dolphins for food.Although the hunting of dolphins greatly declined in the 20th century,many dolphins are still killed inadvertently when they become entrapped in huge nets used to catch tuna.
Dolphins range in size from the small tucuxi dolphin,which grows to about 1.2 m (4 ft) in length and weighs about 50 kg (110 lb),to the killer whale,which can grow to 9.8 m (32 ft) in length and weigh over 5,500 kg (12,100 lb).In most dolphins males grow slightly larger than females
Dolphins are commonly black,brown,or gray in color and are often marked with patterns of white or light colors.
Dolphins throughout the world are threatened by habitat destruction and pollution.During the 18th and 19th centuries dolphins were hunted commercially,especially for the small quantity of valuable oil in parts of the head.This oil was used to lubricate delicate watch mechanisms; cheaper oils have now been found from other sources.Today dolphins are less often hunted,although some cultures continue to take dolphins for food.Although the hunting of dolphins greatly declined in the 20th century,many dolphins are still killed inadvertently when they become entrapped in huge nets used to catch tuna.