7165.diligent(形)勤勉的
The diligent student gets up before dawn every day.
这个勤奋的学生每天天亮以前就起床了。

7166.dilute(动)稀释
The water will dilute the wine.
水能使酒变淡。

7167.dim(形)昏暗的
The light was too to read．
光线太暗，无法阅读。

7168.dime(名)一角硬币
Can you give me a dime for two nickels?
你能不能用两个五分镍币换我一个一毛的镰币？

7169.dimension(名)空间
Time is sometimes called the fourth dimension.
时间有时被称为第四维空间。

7170.diminish(动)减少
The bad news did nothing to diminish her enthusiasm for the plan.
那个坏消息丝毫未减少她对这个计划的兴致。

7171.dip(动)浸泡
Julie dipped her toe into the pool to see how cold it was．
茱莉把脚趾伸进游泳池看水有多冷。

7172.diploma(名)文凭
I'm studying for a diploma in hotel management.
我在攻读酒店管理文凭课程。

7173.diplomacy(名)外交
If diplomacy fails，there is a danger of war.
如果外交努力失败，就有爆发战争之险。

7174.dislomat(名)外交官
In all the delicate negotiations，the dislomat never put a foot wrong.
在微妙的谈判中，这位外交官从未出过差错。

7175.diplomatic(形)外交的
He searched for a diplomatic reply so as not to offend her.
他想找一个得体的答复以免触怒她。

7176.directory(名)电话薄
I tried to look up Joe's number in a telephone directory．
我尝试着要在电话簿上查乔的电话号码。

7177.disadvantage(名)不利之条件
Your qualifications are good. Your main disadvantage is your lack of experience.
你的学历不错，最吃亏的是没有经验。

7178.disappear(动)消失
反义词appear
He walked away and disappear into a crowd of people.
他走开了，消失在人群中。

7179.disappoint(动)使失望
I'm sorry to disappoint you but I'm afraid you haven't won the prize.
我很抱歉让你失望了，但你恐怕没有得奖。

7180.disappointment(名)失望
She has suffered many disappointment in her career.
她在事业中遇到过很多令她失望的事。

7181.disapproval(名)不赞成
反义词approval
She shook her head in disapproval．
她摇摇头表示不赞成。

7182.disapprovel(动)不赞成
反义词approve
His parents strongly disapprovel of him leaveing college before he had finished his course.
他未完成大学课程就辍学了，他的父母极不赞成。

7183.disaster(名)灾难
Losing your job is unpleasant, but it's not a disaster．
失业是令人不愉快的，但还算不上灾难。

7184.disastrous(形)悲惨的
Our mistake had disastrous results．
我们的错误造成了严重后果。

7185.disbelieve(动)不相信
反义词believe
I have no reason to disbelieve her.
我没有理由不相信她。

7186.discard(动)丢弃
You've got to discard before you can pick up another card.
你得先打出一张牌，才能拿另一张牌。

7187.discern(动)辨识
I discerned a note of anger in his voice.
我发觉他声音中带点愤怒。

7188.disciple(名)追随者
We are disciple of the artistic leader.
我们是那位艺术领袖的追随者。

7189.disciplinary(形)纪律上的
The Customs and Excise Department has established itself as an outstanding disciplinary force.
香港海关是一支享有良好声誉的纪律部队。

7190.discipline(名)纪律
A good teacher must be able to maintain discipline in the classroom．
好的老师必须能维持课堂的纪律。

7191.disclosure(名)揭露
He resigned following disclosure about his private life.
他的私生活被揭露后就辞职了。

7192.discomfort(名)不舒服
反义词comfort
There may be some discomfort after the operation．
手术后伤口可能有少许不适。

7193.disconnect(动)切断
反义词connect
If you don't pay your gas bill, your supply will be disconnected．
如果你不交煤气费，煤气供应会被切断。

7194.discontent(名)不满
反义词content
The management could sense growing discontent among the staff．
资方感觉到员工的不满情绪日益高涨。

7195.discourage(动)使气馁
Don't let these little problems discourage you.
别遇到了这些小问题就气馁。

7196.discouragement(名)气馁
Despite all these discouragement， she refused to give up.
她尽管遇到许多挫折，却仍然不气馁。

7197.discouraging(形)令人泄气的
Constant criticism can be very discouraging.
不断的批评会令人十分泄气。