A perennial is a plant that lives indefinitely.多年生植物是指能存活很多年的植物。the perennial problem of water shortage缺水这个老问题I wonder at her perennial youthfulness.我对她青春常驻感到惊讶....
Description: Perennial herbaceous vines, with milky juice , glabrous throughout.形态特徵: 多年生草质藤本, 全体无毛, 有乳汁.Lythrum salicaria is a perennial herb , its root system is a fibrous like tap root system.千屈菜lythrumsalicaria为多年生宿根...
A large wooden table dominates the centre of the room...一张大木桌摆在房间正中央。The territory of a cat only remains fixed for as long as the cat dominates the area.猫的地盘只在它占据那个地方的时候是固定不变的。The village church dominates the skyline.乡村教...
Most babies have a closed ductus arteriosus by 72 hours after birth.大多数婴儿在出生后72小时内动脉导管闭合.Methods: Umbilical vein, ductus venosus and venous ligament and ligamentum teres hepatis anatomized, observed and measured.方法: 解剖观测...
cells affected by mutation受到突变影响的细胞Scientists have found a genetic mutation that appears to be the cause of Huntington's disease.科学家们已经发现了一种可能是引起亨廷顿舞蹈病的基因变异。This mutation makes it better adapted than the other four....