1.drift v.漂流，漂移(to cause to be driven in a current)；（价格等）缓慢变动(to vary or deviate from a set course or adjustment)

联想记忆：在大峡谷(rift)漂流(drift)

例：We watched the leaves drift downstream.//Consumers recognize that the quality of products sold under invariant brand names can drift over time.

2.drining n．钻孔(an action to make a hole with a drill)；训练，演练(exercise, training)

词根记忆：来自drill(v.训练；钻孔)

例：Jackson likened the questions about drilling risk to those about the link between smoking and lung cancer.

3.drizzle n．细雨(a fine misty rain)；细流(streamlet)

例：adrizzle from the faucet水龙头里流出的一股小水流

4.droplet n.小滴，微滴(a tiny drop)

联想记忆：drop(滴)+Iet（允许）--允许滴下来的--小滴

例：Warmed by the Sun, ocean water evaporates, rises high into the atmosphere, and condenses in tiny droplets on minute particles of dust to form clouds.

5.dropout n.<美>中途退学（的学生）( one who drops out of school)

词根记忆：来自词组drop out（中途退学）

例：The school dropout rate declined immediately after the adoption of interactive computer instruction.

6.drought n．干旱，旱灾(a period of dryness especially when prolonged)

联想记忆：dr(看作dry)+ought(应该)--应该干--干旱

7.dubious a．可疑的(doubtful);不确定的(giving rise to uncertainty)

词根记忆：du(=)+bious一有两种想法一不确定的

例：The manager decided not to hire the dubious applicant.//The result is still dubious.

8.ductile a．易变形的(easily led or influenced)；可塑的(plastic)

词根记忆：duct(引导)+ile--可引导的--可塑的

例：The descending rock is less ductile and much more liable to fracture.

9.dump v.倾倒（to release or throw down inalarge mass）；倾销(to sell in quantity at a very low price; specifically to sell abroad at less than the market price at home);n.堆存处(a place where materials are stored)

发音记忆：“当铺”一到当铺去倾销

例：Residents were not allowed to dump their trash in the parklands.// Many companies charge that foreign companies dumped their products at less than fair value.

派生词：dumping(n.倾销)

10.dumpster n.垃圾桶 (used for a large trash receptacle)

例：Residents deposit recyclable trash in municipal dumpsters located in the parking lot.