1.
There is no fixed rule.

没有一成不变的规则。
2.
the steady tick of the clock;

钟表一成不变的滴答声;
3.
nothing is seen as unchangeable.

没有什么是一成不变的。
4.
There are no hard-and-fast rules for success.

通往成功没有什么一成不变的规则。
5.
yet English words do not stay the same.

但英语的词汇并不是一成不变的,
6.
This is by no means a regular rule.

这并不是一成不变的规律。
7.
Change happens/takes place all the time; nothing stays the same for long.

事物总是不断变化的,没有一成不变的东西。
8.
It is a nearly static theory.

这是一条几乎一成不变的理论。
9.
The brain is by no means immutable, even in adulthood.

大脑绝对不是一成不变的,即便是成年之后。
10.
Culture will never remain static.

文化并不是定型的,也绝不是一成不变的。
11.
Life is a way of ever-becoming, not a way of becomed!

生命是一个永远持续形成中的方式,而不是一成不变的既成公式!
12.
the inalterable routine of a physician.

内科医生的一成不变的诊治程序
13.
Nothing is not changing / Nothing is unchangeable

一成不变的东西是没有的
14.
Nothing is changeless.

一成不变的东西是没有的。
15.
This distinction isn't hard and fast.

这样的分类并非是一成不变的.
16.
Where was the room for an absolute or a conventional morality?

哪有什么绝对的或者一成不变的美德?
17.
I don't like to sit and look at the same stage scenery one act after another.

我不喜欢—幕接一幕地坐着看这一成不变的布景。
18.
I suspose nothing ever stays the same.

我想没有什么事是一成不变的。