That may seem troubling , but even more worrisome , scientists say, is the swelling tidal wave of extinction that lies in the future.
That may seem troubling , but even more worrisome , scientists say, is the swelling tidal wave of extinction that lies in the future.
这已经不是什么好事，更让科学家们担忧的是将来俞发高涨的绝种流潮。