n. 流感, 流行性感冒

◆记忆方法一：
谐音：俘虏 流行性感冒俘虏了很多人。
◆记忆方法二：
发音想成“腹露”（肚子露在外面，着凉了，就会感冒）
◆记忆方法三：
联想方式：flu-（俘虏）
记忆方法：被流感俘虏了就会生病感冒。

blood/bloody/bleed/flood/flow/float/fly/flight/flu/fluent/fluency/flee/flash/flashlight
记忆：
1. oo联想血管，blood n. 血液 Blood is thicker than water. 血浓于水。
2. 加形容词后缀-y: bloody adj.血腥的, 嗜杀的, 有血的, <英>该死的, 非常的 The empire was built on the bloody killing and seizing. 这个帝国是建立在血腥的杀戮和掠夺上的。
3. bleed [ bli:d ] vi. 流血 With more wars started by the USA, the earth is bleeding more and more heavily. 随着美国发动的越来越多的战争，地球正不断地流血。
4. fl-表示流动，飘 flood n.洪水, 水灾, vt.淹没, 使泛滥, 充满 The local people used to suffer a lot from flood every year. 当地人过去年年遭受洪水灾害。
5. flow vi. 流动, 涌流 The water in the river nearby flows quickly. 附近的河里水流湍急。
6. float n. 漂流物 vi. 浮动, 飘浮 Have you noticed there is something floating on the river? 你注意到河上飘浮着某种东西了吗？
7. fly [ flai ] n. 苍蝇, 两翼昆虫, 飞行vi.飞翔, 飘扬 It’s disgusting to see flies flying around you. 看到身边飞舞着苍蝇是令人恶心的。
8. flight [ flait ] n.飞行,飞机的航程, 班机, 楼梯的一段 Our flight has been canceled due to the storm. 由于暴雨，我们的航班取消了。
9. flu [ flu: ] n.流感 Be careful not to catch a flu. 当心流感！
10. fluent adj.流利的, 流畅的 I admire her for her fluent English. 我羡慕她流利的英语。
11. fluency n. 流利, 流畅, 雄辩 Her fluency impressed everyone present. 她流利的语言给在场的人留下了深刻的印象。
12. flee [ fli: ] vt. 逃避, 逃跑 vi. 消散, 逃 How could you flee when the fire broke out? You were a fireman! 火灾发生的时候你怎能逃跑？你可是一个消防员！
13. flash vi. 闪烁 The lightning flashed across the night sky now and then. 时不时闪电划过夜空。
14. flashlight n.手电筒, 闪光灯 It’s convenient to carry a flashlight at night. 夜间带上手电筒很方便。
另类阅读：
The blood bleeding from his wound made the head bloody. He tried to float in the flood, but it was flowing too fast like flying in a flight.