The problems of lightening motorcar and recycle of material were brought forward for sparing energy sources and protecting environment of the Earth.
为了节约有限的能源和保护地球环境，人们开始提出汽车的轻量化和材料的再生利用等问题。
Society should not stop protecting the environment just because environmental regulations reduce our material standard of living.
正因为环境的规章减少我们生活水平的原料，所以社会有应该停止对环境的保护。
RPC is a new kind of composite material, which has high mechanical property, durability and environment-protecting property compared with conventional concrete.
活性粉末混凝土(RPC)是一种新型复合材料，具有良好的力学性能和耐久性能。
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