1.framework n.框架 (a basic conceptional structure)

例： Relational feminism provides the best theoretical framework for contemporary feminist politics.

2.franchise n．特權(a special privilege granted to an individual or group)；經銷權(a team and its operating organization having such membership)

例：We should not approve the business loan application of the local group that wants to open a franchise outlet for the Kool Kone chain of ice cream parlors.

同根詞：enfranchise(讓給予選舉權)

3.fraternal a．兄弟的(of, relating to, or involving brothers)

詞根記憶：fratern(兄弟)+al--兄弟的

例：fraternal twins異卵雙生

4.frequency n. 頻率 rate of occurrence or repetition of sth.)

詞根記憶：來自 frequent( a.頻繁的 )

例：Southern Airways has a far worse safety record than Air Dacentaria over the past few years, in terms of both the frequency of accidents and the severity of accidents.

5.friction n．摩擦(the rubbing of one body against another)

例：Under normal conditions, rocks composed of clay produce far less friction than other rocks do.

派生詞：frictional(a．摩擦的)；frictionless(a．無摩擦的)

6.frontier n．國境(a border between two countries)；邊緣地帶(a region that forms the margin of settled or developed territory)

詞根記憶：來自front(n．前方)

例：the North American frontier北美邊境

7.frugal a．節約的，節儉的(sparing, thrifty, economical)

發音記憶：“腐乳過日”--吃腐乳過日子--節約的

例：Personal savings have been accumulated, often through frugal living habits.

派生詞：frugality(n．節約，節儉)

8.frustrate v.挫敗(to defeat)；（使）沮喪(to induce feelings of discouragement in)

例：The difficult exam frustrated the entire class.

派生詞：frustration(n.沮喪，挫折)

9.fuel n．燃料(a material used to produce heat or power by burning)；v.給…加燃料(to provide worth fuel)；刺激(to stimulate)；推動(to support)

聯想記憶：加滿( fuel)燃料(fuel)

例：The use of coal as a fuel has declined from the level it was at in the previous twenty years.//The growth of the restaurant industry was fueled by recent social changes.

派生詞：refuel(v．加油．加燃料)