来看今天的长难句： XK@Ct eP"
They predict that a complete understanding of the human genetic code would provide untold benefits for humanity，for example，those abilities to diagnose, cure, and eventually prevent many diseases caused by faulty genes. R'B-$:u
_6\"U5*Y
步骤一：找主干 jh~E!%d77
=n_>7@9l
这是一个宾语从句，主干为：They predict that ... 他们预测说...... !<5Wi)*
p3cb_
步骤二：拆分句子 xL!@$;J
uVZX53 ,g
为了便于分析，帮助大家理解，把这个句子切分了一下，并标上了序号。 ?;
tz
①They predict ②that a complete understanding of the human genetic code would provide untold benefits for humanity, for example, those abilities to diagnose, cure, and eventually prevent many diseases caused by faulty genes. 9G{#a#Z.
?#/~ BZR!
① They predict ... They 是整个句子的主语，predict 是谓语 7,R
~2ss5z
② that 直至句末是一个由 that ...引导的宾语从句，在该从句中： =O~Y6|
a complete understanding of the human genetic code 是主语 U %aDkC+M
would provide 是谓语 i [2bz+Z?
untold benefits for humanity 是宾语
Qs8Rb ]%|
for example 是插入语 J L2g!n=
K
those abilities to diagnose ... faulty genes 为前文untold benefits for humanity 的同位语 +-Miei Kv
to diagnose, cure, and eventually prevent many diseases caused by faulty genes 动词不定式短语作定语，修饰 abilities 8MBvp*
caused by faulty genes 动词的过去分词短语作后置定语，修饰 diseases E-HK=D&W/
/k=k rAz.
步骤三：查生词 RWXN
[LKzH!
1. genetic [dʒəˈnetɪk] adj. 基因的；遗传学的 \|C~VU@
genetic and environmental factors 遗传和环境因素 ~ {{@m]P
genetic abnormalities 基因异常 y:R+; 91
5DVSaI$ =
2. untold [ˌʌnˈtəʊld] adj. 不计其数的；难以估量的 2%~+c|TH.)
An Olympic gold medal can lead to untold riches for an athlete. - @mcu{&
一枚奥运金牌能给运动员带来无尽的财富。 d +&w7/F
]?0]K!7Ea
3. faulty [ˈfɔːlti] adj. 有缺陷的 .N Z
This machine is guaranteed for a year against faulty workmanship. -}"nb-RR\
这种机器如有工艺缺陷可保修一年。 T)Pr%kF
a]0hB:
参考译文： NsL!AAN[V
他们预计，对人体基因编码的全面认识将给人类带来无法估量的好处，例如，使人类能够诊断、治疗并最终预防由基因缺陷造成的很多疾病。
