1、suffer
遭受，经受(疼痛);感到(痛苦)
Within a few days she had become seriously ill, suffering great pain and discomfort.
几天的时间，她就病得很严重了，疼痛难忍，周身不舒服。
Can you assure me that my father is not suffering?
你能保证我父亲不会受罪吗？
遭遇，遭受，蒙受(不好的事)
The peace process has suffered a serious blow now.
现在和平进程遭到重创。
Romania suffered another setback in its efforts to obtain financial support for its reforms.
罗马尼亚在为其改革努力寻求经济援助时再次受挫。
受挫;遭受打击
There are few who have not suffered.
谁都会经受挫折。
It is obvious that Syria will suffer most from this change of heart.
很明显，这一态度的转变对叙利亚的影响最大。
2、constant
持续不断的;重复的;一直存在的
She suggests that women are under constant pressure to be abnormally thin.
她暗示说女性总是处在保持身材异常瘦削的压力之下。
Inflation is a constant threat.
通货膨胀始终是个威胁。
恒定物;常数；常量；常项
In the world of fashion it sometimes seems that the only constant is ceaseless change.
在时装界，有时似乎唯一永恒不变的东西就是不断的变化。
Two significant constants have been found in a number of research studies.
若干研究已经发现了两个重要常量。