中 The grand mediocrity of today--everyone being the same in survival and number of offspring--means that natural selection has lost 80% of its power in upper-middle-class India compared to the tribe.
【简答题】The teacher stood before his class of 30 students and was going to hand out the final exam papers. “I know how hard you have all worked to get ready for this test. ” he said. “And because I know you a...