【根】mut＝to change（改变）

mutable
Capable of or subject to change or alteration. Prone to frequent change; inconstant: mutable weather patterns.
Tending to undergo genetic mutation
adj. 易变的，不定的；性情不定的

immutable
Not subject or susceptible to change.
adj. 不变的；不可变的；不能变的

mutant
An individual, organism, or new genetic character arising or resulting from mutation.
Slang. One that is suggestive of a genetic mutant, as in bizarre appearance or inaptitude.
Resulting from or undergoing mutation: a mutant strain of bacteria.
Slang. Suggestive of a genetic mutant.
n. 突变体；突变异种
adj. 突变的

词组短语:
mutant strain 突变系；突变菌株；突变株
mutant gene 突变基因；变异基因
Teenage Mutant Ninja Turtle 忍者神龟（美国动画电影） ninja【日】忍者

例句：
The result of these experiments will be a nightmarish world filled with two-headed monsters and other mutants.
这些试验的结果将造成一个可怕的世界,充满了双头怪和其他怪物。

mutation
The act or process of being altered or changed.
An alteration or change, as in nature, form, or quality.
Genetics. A change of the DNA sequence within a gene or chromosome of an organism resulting in the creation of a new character or trait not found in the parental type. The process by which such a change occurs in a chromosome, either through an alteration in the nucleotide sequence of the DNA coding for a gene or through a change in the physical arrangement of a chromosome. A mutant.
Linguistics. The change that is caused in a sound by its assimilation to another sound, such as umlaut.
n. 变化，转变；[遗] 突变,变种；【语言学】元音变化

mutual exchange交换
Having the same relationship each to the other: mutual predators.
Directed and received by each toward the other; reciprocal: mutual respect.
Possessed in common: mutual interests.
Of, relating to, or in the form of mutual insurance.
adj.共同的；相互的，彼此的

例句：
Mutual understanding is essential to friendship.
相互理解对友谊至关重要。
We found that we had a mutual friend.
我们发现我们有一个共同的朋友。

mutuality
condition or quality of being mutual; reciprocity; mutual dependence
n. 相互关系，相关；亲密

趣味单词

zoom
To make a continuous low-pitched buzzing or humming sound. To move while making such a sound.
To climb suddenly and sharply. Used of an airplane.
To move about rapidly; swoop.
To simulate movement rapidly away from or toward a subject using a zoom lens.
Computer Science. To cause text or other graphics in a window or frame to appear larger on the screen.
To cause to zoom.
The act or sound of zooming.
A zoom lens.
n. 急速上升；嗡嗡声；[摄] 变焦摄影
vi. 急速上升；摄象机移动
vt. 使摄象机移动

词组短语：
zoom in v. 放大
zoom lens 变焦镜头
zoom out 缩小
digital zoom 数码变焦；数字变焦

例句：
The prices of food have zoomed this year.
今年食品价格猛涨。
Nick went zooming past in his new car.
尼克开着新车轰地一声飞驰而过。
The camera zoomed in on the girl's face.
摄影机镜头向女孩子的脸部推近。