Помогите перевести пожалуйста.1. The sun039;s mass is 750 times that

Помогите перевести пожалуйста.
1. The sun's mass is 750 times that of all the plants together.

2. The first industrial nuclear power station in the world was constructed in Obninsk not far from Moscow in 1954. The station was put into operation two years earlier than the British one and three and a half years earlier that the American nuclear power - stations.

3. The nuclear superheating of steam was achieved directly in the reactor itself before steam is carried into the turbine.