【根】cre＝to make（制造），to grow（生长）

recruit
To engage (persons) for military service.
To strengthen or raise (an armed force) by enlistment.
To supply with new members or employees.
To enroll or seek to enroll: colleges recruiting minority students.
To replenish.
A newly engaged member of a military force, especially one of the lowest rank or grade.
A new member of an organization or body.
n. 招聘；新兵；新成员
vt. 补充；聘用；征募；使…恢复健康
vi. 征募新兵；得到补充；恢复健康

例句:
The wartime cabinet first recruited men into the forces from non-essential industries.
战时内阁首先从非重点工业中招募人员补充武装力量。
Many young peasants were recruited into the coal mining industry.
煤炭工业中雇用了很多年轻的农民。

concrete
made of concrete
based on facts, not on ideas or guesses
a concrete object is one that you can see and feel
building material that is made by mixing together CEMENT, sand, small stones and water
~ sth (over) to cover sth with concrete
adj. 混凝土的；实在的，具体的；有形的
vi. 凝结
vt. 使凝固；用混凝土修筑
n. 凝结物;具体物

短语:
in the concrete 在实际领域内；实际上；具体地

例句:
The word "apple" is a concrete noun.
"苹果"是个具体名词。
The workmen are still busy concreting the road.
工人们仍忙着用混凝土铺路。
She is interested in art concreted with nature.
她对与自然融合的艺术很感兴趣。

recreate
to refresh by means of relaxation and enjoyment, as restore physically or mentally.
to take recreation.
vt. (尤指在工作后)使得到消遣(或娱乐)
vi. 消遣;娱乐

例句:
They recreate themselves with playing bridge.
他们以打桥牌作消遣。

recreation
refreshment by means of some pastime, agreeable exercise, or the like.
a pastime, diversion, exercise, or other resource affording relaxation and enjoyment.
n. 娱乐；消遣；休养

crescendo
a gradual increase specifically : a gradual increase in volume of a musical passage
the peak of a gradual increase : CLIMAX <complaints about stifling smog conditions reach a crescendo ― Down Beat> a crescendo musical passage
with an increase in volume ― used as a direction in music
n. 声音渐增
adv. 渐次加强地
adj. 渐强的
vi. 音量逐渐增强

decrescendo
gradually reducing force or loudness; diminuendo (opposed to crescendo).
a gradual reduction in force or loudness.
a decrescendo passage.
n. 渐弱；渐弱音
adj. 渐弱的
adv. 渐弱地

decrescent
diminishing; decreasing.
waning, as the moon
adj. 变小的；渐减的；亏缺的

decrepit
Weakened, worn out, impaired, or broken down by old age, illness, or hard use. See Synonyms at weak.
adj. 衰老的；破旧的

例句:
A decrepit old man sat on a park bench.
一个衰弱的老人坐在公园的长凳上。