7、Since the clever boy realizes that he himself is keen on physics, he makes a decision to study this interesting subject well with the help of his teacher.
由于那个聪明的男孩意识到他自己热爱物理，他决定在老师的帮助下好好学这个有趣的学科。
realize [ˈriːəlaɪz] v. 理解; 领会; 认识到; 意识到;
be keen on 喜爱
make a decision 作出决定
with the help of 借助于, 在...的帮助下
8、 Besides eating more vegetables and less meat, these fat men have to take several exercises such as playing basketball, running in order to lose weight .
除了多吃蔬菜少吃肉，这些肥胖的男人们必须做一些锻炼来减肥，例如打篮球，跑步。
besides [bɪˈsaɪdz] prep. 除....之外（还）
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besides |
除了...之外还有，表示累加关系 |
He is interested in tennis besides football. 除了足球，他还对网球感兴趣。 |
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except |
除了，表示从整体中除去 |
Everyone is excited except me. 除我以外，每个人都很激动。 |
except for放在句首。except一般不用在句首 |
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except for |
除了，排除不同类事物，用于对某种情况进行具体细节修正，引出一个与前面的词相反的原因或者事例 |
The bus was empty except for an old lady. 公交车上要不是坐了一位老太太就是空的。 |
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but |
除了，只能用在no、none、nobody等词之后 |
No one but me passed the exam yesterday. 昨天，除了我以外没别人考及格。 |
exercise [ˈeksəsaɪz] n.运动，练习，锻炼 v. 训练 泛指锻炼时,做不可数名词。（保持健康或培养技能的）一套动作、训练活动、练习等时做可数名词。
such as: 象…这样; 诸如…之类。做类比用，后面跟着这一类的几个；for example,单独举例，后面就跟一个。
lose weight: [luːz weɪt] 减肥; 体重减轻 take off weight
9、 It is very kind of you to help us repair this new computer for it is difficult for us to finish the work without it in time .
你太好了，帮我们修好了这台新电脑，因为对我们来说，没有它要及时完成工作是困难的。
it is + adj. +of sb to do sth. 中的adj.一般用来表示人的性格、品德。是表示主观感情或态度的形容词， 如：kind, clever, foolish等
it is + adj.+for sb to do sth.中的adj.一般用来表示事物的特征特点。是表示客观形式的形容词，如：easy, difficult, interesting, impossible等
help sb do sth: =help sb to do sth, 帮助某人做某事，help sb with sh 在某方面帮助某人
in time: 及时，某件事在结束之前或设定时间到来之前发生。反义词：too late
on time: 准时：某件事发生在既定的时间，也就是按照时间表完成时。反义词：late
10、All the members in this club are worried about the changes of climate so they perform an activity to ask more people to protect environment.
这个俱乐部的所有成员都担心气候的变化，因此他们发起一个活动让更多的人来保护环境。
member [ˈmembə(r)] n. 成员; 会员;
are worried about 为……担心
climate [ˈklaɪmət] n. 气候;
perform [pəˈfɔːm] v. 表演; 执行
protect [prəˈtekt] v.保护; 防护;
environment [ɪnˈvaɪrənmənt] n. 环境; 生态环境;