A third sources, the warming-enhanced decay of organic matter in forests and soils, especially in the middle and higher latitudes, is now being recognized as potentially significant.
This part of the course had less technical apparatus than the first part of the course so it will concentrate on the middlethird of the course up to this lecture.
这门课的这个部分比第一个部分的,技术器械少,所以它将着重于,今天下课之后这门课还剩三分之一。
3
Oregon ranks in the middlethird for all of our pollution metrics, including 29th in EPA toxic waste violations and 33rd in toxic exposure, according to the RSEI index.