lack of没有,缺乏;不足,不够
for lack of因缺乏…;因缺少…;因没有…
2.By 1908, the United States was the only industrial nation in the world that lacked workers' compensation insurance.
1908年以前,美国是世界上唯一一个没有工人赔偿保险的工业国家。
3.The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
植物的祖先是进行光合作用的单细胞生物,由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构,如花朵。