adult
One who has attained maturity or legal age.
Biology. A fully grown, mature organism
Fully developed and mature.
Relating to, intended for, or befitting adults: adult education.
Containing or dealing in explicitly sexual material; pornographic
adj. 成年的；成熟的
n. 成年人

adolescent esce+ent=escent -esce 表开始或正在进行
Of, relating to, or undergoing adolescence. See Synonyms at young.
Characteristic of adolescence; immature: an adolescent sense of humor
A young person who has undergone puberty but who has not reached full maturity; a teenager.
adj. 青春期的；未成熟的
n. (尤指16岁以下的)青少年，青春期的男女

coalesce
To grow together; fuse.
To come together so as to form one whole; unite: The rebel units coalesced into one army to fight the invaders
vi. 合并；结合；联合
vt. 使…联合；使…合并

例句：
The edges of the cut coalesced.
伤口愈合了。
Their views coalesced to form a coherent policy.
他们的各种观点已统一为一致的政策。

coalition
An alliance, especially a temporary one, of people, factions, parties, or nations.
A combination into one body; a union.
n. 联合；结合，合并；(政党、国家等)临时结成的联盟

例句：
During the war Britain was ruled by a coalition.
大战期间英国由联合政府主政。

prolific -ficus [-fic] 拉丁语 -ficus [后缀，表“…的”]
Producing offspring or fruit in great abundance; fertile.
Producing abundant works or results: a prolific artist. See Synonyms at fertile.
adj.大量繁殖的，多育的；富于创造力的；作品(或成果)丰富的;丰富的；富饶的

例句：
The last few pages of the document are prolific of mistakes.
这个文件的最后几页错误很多。

proliferate fer拿；带 prefer offer
To grow or multiply by rapidly producing new tissue, parts, cells, or offspring.
To increase or spread at a rapid rate: fears that nuclear weapons might proliferate.
To cause to grow or increase rapidly
vi. 增殖；扩散；激增
vt. 使激增

例句：
During the 1990's, computer companies proliferated.
20世纪90年代电脑公司的数量激增。