6.It took alotof blood, sweat and tears to get to where we are today, but we have just begun. Today we begin in earnest the work of making sure that the world we leave our children is just a little bit better than the one we inhabit today。
12.The ~(137)Cs concentration of the fine fraction which includes the clay, silt and very fine sand is higher than that of the middle size sand, coarse sandand very coarse sandof the same soil.