1.function v.运行(to operate)；起作用(to serve)；n．职责(duty)；作用；功能（effect）

发音记忆：“放颗心”--公务员的职责就是让人民放心--职责

例：The old watch can't function properly.//A major function of self-help networks is financial support.

派生词：functional(a．起作用的：实用的)：functioning(n.运转，操作)

2.fundraise n.募捐(raising money)

分拆记忆：fund(资金)+raise(筹集)--筹集资金--募捐

例：The Arnmore Laboratories and Arnmore Research Facilities were founded by Leo and Fontove Arnmore in 1989 after ten years of fundraising.

3.fungi n.（fungus的复数）真菌(any of various of types of plants without leaves ,flowers or green colouring-matter growing on other plants or decaying matter)；突然发生并迅速发展的东西(something taking place suddenly and developing quickly)

发音记忆：“房盖”--真菌的形状像房盖

例：The study shows that the death of those plants is due to insects and fungi.

4.fungus n.真菌，霉菌,菌类

联想记忆：fun(有趣)+g+us（我们）--我们第一次看到有趣的真菌--真菌

例：Beneath the soil of the Malheur National Forest in eastern Oregon ,a fungus that has been slowly weaving its way through the roots of trees for centuries has become the largest single living organism known to biologists.

5.funnel n.漏斗(a utensil that is usually a hollow cone with a tube extending from the smaller end and that is designed to catch and direct a downward flow)：v.汇集，集中(to move to a focal point)

注意：tunnel (n.隧道)

例：Mary funneled all her efforts into her studies.

6.furnace n.熔炉( an enclosed structure in which heat is produced(as for heating a house or for reducing ore)

例：This furnace is used to melt the iron that will be made into steel.//blast furnace鼓风机

7.tuse v.熔化,熔融 (to reduce to a liquid or plastic state by heat);融台(to combine, to become blended or joined)

例： Wynton and Branford Marsalis, brothers who have fused the complex rhythms of contemporary jazz with the rollicking musical legacy of their hometown, are fitting symbols of the New Orleans jazz revival.

派生词： fusion( n.融合:熔化 )

8.fusion n.融合(a union by or as if by melting)；聚变(union of atomic nuclear)

词根记忆：来自fuse(V.让融合：熔化)

例：Stars like the Sun can continue to shine steadily for billions of years because its light and heat are produced by nuclear fusion.

同根词：fusible(a．易熔的：可熔的)

9.futile a.无益的(worthless)；无用的(useless)

联想记忆：fut=fus(流出，倒出)+ile(能…的)--能倒出去的--无用的

例：The mayor's futile gestures to the angry citizens only angered them further.

同根词：refute(v．反驳，驳倒)