مفردات TOEFL

to try to do something, especially something difficult or uncertain

尝试；试图

to regard an outcome or feature as being caused by a particular factor

把……归因于

a value calculated by adding a set of numerical values and dividing the sum by the number of values

平均数；算术平均值

to keep an unwanted situation from happening or keep away from something undesirable

避免；避开

An appropriate relationship or mixture between competing needs or qualities.

平衡；适当搭配；不同需要或特点之间合适的关系

A difficulty that impedes or prevents access, communication, or progress.

障碍；阻碍或妨碍进入、交流或进展的困难

The underlying support or grounds for a judgment or activity.

基础；依据；判断或活动所依托的支撑

as a result of the person, event, or situation named afterward

因为；由于

before the event or activity being discussed

事先；预先

to be a member or part of a particular group, class, or category

属于某个群体、类别或整体

having a helpful or positive effect

有益的；有利的

A helpful result or advantage.

益处；好处；某项行动带来的有利结果

A limit separating areas, categories, or permitted activity.

界限；边界；区分范围、类别或允许活动的限制

to cause a change or event to happen

使发生；带来

to introduce a subject so that it can be discussed

提出；提起（话题）

to make a range, scope, or understanding wider

拓宽；扩大范围；扩展认识

To use an existing idea, achievement, or experience as a basis for further development.

在……基础上发展；利用已有观点、成果或经验继续推进

when compared with the case that has just been mentioned

相比之下；比较起来

used to introduce a case or feature that differs from one just described

相比之下；与之相对；引出和前述情况不同的对象或特点

before or at the point when the event in the following clause happens

到……的时候；在……之前或之时

used to introduce an additional point or a topic that is not the main focus of the conversation

顺便说一下；另外

to cancel an arranged event or stop an activity that was planned or underway

取消；中止

The ability of a person or system to perform a particular function.

能力；个人或系统执行特定功能的能力

to continue doing an activity, especially after a pause or interruption

继续；接着做

to perform a task, follow a procedure, or put a plan into action

实施；执行；开展

A particular situation or example being considered.

情况；事例；正在考虑的某个具体情境或实例

to do or review something that was missed or left unfinished earlier

补做；补看；补上

a group of people or things that share a feature used to classify them

类别；种类

Something that produces an event or situation.

原因；起因；促使某件事发生的事物