Nuclear waste is oftenof in the ocean.处理核废料的方式通常是投入海洋。

dispute n.争论，纠纷vt.争论，争执；对…提出质疑

The worker did not think his salary was high enough and had a dispute with the boss.人认为自己的工资不够高，于是与老板发生 了争执。

Critics have disputed the official unemployment figures.评论家们对官方的失业数据提出 质疑。

dissolve vt.使溶解

Some kinds of medicine have to be dissolved in water before being taken.有一些药品在服用之前，必须用水溶解。

distinct adj.明确的，确实的；不同的

The twins may look alike, but they have quite distinct personalities.那对双胞胎看起来很像，但他们却有着迥然不同的个性。

distinction n.①差别，特性②显赫，声望

The only distinction between the twins is their eye color.那对双胞胎唯一的区别是他们眼睛的颜色。

The awards added distinction to the author’s reputation.这些奖项让这位作家更加有声望。

distinguish vt.区别，辨认

The little girl forgot to wear her glasses and could not distinguish between the rope and a snake.那个小女孩忘了戴眼镜，结果分不清绳子和蛇。

distress n.悲痛，不幸，穷困

Although she said she was okay, her face showed her distress over the death of her boyfriend.虽然她说自己没事，但从她的脸色能看出男朋友的离世给她带来的悲痛。

distribute vt.分配；分发，散布

Someone dressed in a rabbit costume distributes leaflets to passersby.穿着兔子服装的人向行人发传单。

disturb vt.打扰，扰乱

Every morning the birds disturb my sleep.每天早上，那些鸟都会打扰我睡觉。

diverse adj.不同的；变化多的

Even though the topography of different areas of the southwestern United States is diverse,the weather patterns are quite similar.虽然美国西南部不同地区的地形多种多样，但天气模式却非常相似。