lefthandadj.左手的(用左手的；靠左行驶)leftadj.左边的adv.向左n.左边；左派分子；【体】左手拳动词leave的过去式和过去分词形式.left brow posterior position左额后位left sided accessory pathway左侧(边)附加通道Left wall of urinary bladder膀胱左壁left-handed multiplication左乘,左乘法left limit of sternal border胸骨左缘Left ventficular hypertrophy左心室肥厚left ventrieulax hypertrophy左心室肥厚left salpingo-oophorectomy左侧输卵管卵巢切除术left quasi-regular element左拟正则元素Left power seat control unit左电动座椅控制装置

1. Two weeks later, Becquerel noticed that uranium had left a mark even though not exposed to sunlight.
   两个星期以后，贝克雷尔注意到，即使不把它们置之于阳光之下，铀也会在底片上留下不可磨灭的痕迹。