Internal fertilization is an adaptation to life in a terrestrial environment.

体内受精是对陆地生活环境的一种适应.

互联网

Heavy metal contamination of terrestrial environment has been significant issue for people more recently.

重金属污染正日益受到人们的关注.

互联网

Now terrestrial environment protection's key is reduces the carbon dioxide and the waste gas emission rate.

现在地球环境保护的关键就是减少二氧化碳和废气的排放速度.

互联网