He denies demanding money with menaces.他否认有过勒索钱财的行为。I laughed in my sleeve at his menaces.对于他的恐吓,我暗自好笑.Submarine and carrier aircraft were the menaces the great guns could not fight.潜艇和航空母舰上的飞机,构成了那些大炮无法应付的威胁....
In 1857 Mendel started experimenting with peas in his monastery garden.1857年，孟德尔开始在修道院的菜园里用豌豆做实验。Mendel tried crossbreeding.孟德尔尝试了杂交育种。Examples are Mendel's pea characters.例如孟德尔的豌豆的性状....