Here is a study on the effects of the composition and amount of the reprocessed raw material from building waste on the physical and mechanical performances of recycled concrete.

研究了建筑垃圾再生原料的组成与用量对再生混凝土物理力学性能的影响。

youdao

The company's vice president, William Weimer, says the M-88s are legal to purchase by consumers because they have a limited amount of pyrotechnic composition and are not very strong.

CNN: By the CNN Wire Staff

Weather is caused by disturbances within the atmosphere, but climate is controlled by external influences, such as the distribution of oceans and continents, the extent of ice and snow-cover, variations in the amount of energy from the sun, and changes in the chemical composition of the atmosphere.

BBC: Time to spend more money preparing for colder winters?