1.estimated adj.估计的
例句：I had estimated spending no more than $300 but in the end I spent a lot more.
我估计不会花费超过300美元，但是我支付的真实数额却高得多。
2.abnormal a.反常的, 不规则的, 变态的, 畸形的
例句：The climate in recent years has been so abnormal, the temperature in winter even sometimes gets up to 20 Centigrade!
这年头儿气候太反常了，冬天里气温竟然高达20度！
3.immune a.免疫的, 免除的, 不受影响的
例句：This patient's immune system has been destroyed.
这位病人的免疫系统受到了破坏。
4.wheeze n.喘气声, 喘息
5.westernize v.vi. (使)西洋化, (使)欧化
1.Asthma is a serious lung disease that makes it difficult to breathe.
makes it difficult to breathe宾语补足语
make用作使役动词表示“使；使成为”时，可跟复合结构，即“make+宾语+宾语补足语”，其中的宾语补足语可以是形容词或名词、不带to的不定式、过去分词。
(1)我们推选他为我们足球队队长。
We made him captain of our football team.
(2)我们队赢了的消息使我们大家非常高兴。
The news that our team had won made us very happy.
(3)大雨使得我们无法出去。
The heavy rain made it impossible for us to go out.
(4)奇怪的声音使我们感到恐惧。
The strange noise made us frightened.
(5)在交通嘈杂声中他无法使自己的声音提高到让别人听到。
He couldn’t make himself heard above the noise of the traffic.
(6)什么东西使得草生长?
What makes the grass grow?
注意：过去分词作make的宾语补足语时，变为被动语态不用加to； 但当不定式作其宾补时，变为被动语态一定要加to。
这个男孩被迫每天干十二个小时的活。
The boy was made to work twelve hours a day.
2.They say it feels as if someone is sitting on them.
as if好像
例句：It appears as if he was right, but actually he was not.
他看起来好像是对的，但实际上根本不对。
3.When asthma is most severe, the person may have extreme difficulty breathing.
have difficulty doing 做某事有困难
例句：I have difficulty remembering names.
我不易记住人名。
4.Allergies are abnormal reactions of the immune system in response to otherwise harmless substances.
in response to回应
例句：Improvements were done in response to our customer's demands.
应客户要求，我们的改进工作已全部完成。
5.It is attached to a mask that he placed over his mouth and nose.
attach to 适用于；归因于；属于；伴随
例句：I attach great importance to education.
我十分重视教育。