He had to spend about six months in a class with younger students.
他不得不在一个比他小的学生的班上呆了大约六个月。
Since they can and do successfully inter-breed, they cannot be classed as different species.
既然它们能够而且确实可以成功杂交繁殖,它们就不能被归为不同的物种。
Kite undoubtedly demonstrates exceptional class as a performer.
凯特作为表演者无疑展现了非凡的卓越水准。