With plants we have conclusive evidence that the sterility of crossed species must be due to some principle . 在植物方面,我们已有确实的证据,表明杂交物种的不育性一定是由于某种原理而起。
Finally a courier came up from jonesboro with the reassuring news that the yankees had been beaten back . 直至有一个传令兵从钟氏坡来,方才给了她们一个比较确实的消息。据那传令兵说:钟氏坡的北佬被击退了。
If the first possibility is true, then the fossils were lifted to their present altitudes later by the plateau's upward thrust . 如果第一种可能性是确实的,那么化石是后来由于高原向上隆起才抬升到现在的高度。
The greater part of what you heard is not true 你所听到的大部分都是不确实的。