Help translate a paragraph of English 2

Because the sky is full of millions of migratory birds, scientists say that the seasonal weadcr of Eutopean seems strange; A teacher's bird is not as good as a fly. The research results lead to an opposite theory, namely aerodynamics and Whieh, that electric power needs to increase the flying weight. Obviously, for birds, the cost of flying and fat are much more than we want. Resenrchers found that the normal weight of the square in the Red Bird Garden was 1 1,000 grams, and there was no difference between them. 50,000 kilometers. In another research magazine, Naturnndvanrage measured a flying group, which made nominal birds fly smoothly and saved energy. Aviation research. French scientist Henry said that the heart rate of Yu Fei's family is lower than 65438 04.5 hundredths of a second. This result helps to explain why it is difficult to hold public sacrifices in bird migration. Rescarehers thinks that thin birds will have a better chance of survival. The first study shows that obesity is based on the fact that immigrants consume more value than energy as fuel and need to carry extra weight. In their research, they learned that researchers studied the flight of birds to simulate different weights in 28 flights. They especially need a small amount of water to fly with measurable energy.