一年四季变化及其对动植物的影响

形容词重要的; 有意义的; 有重大意义的; 值得注意的

名词有意义的事物; 象征，标志

1. 数量相当大的;显著的
A significant amount or effect is large enough to be important or affect a situation to a noticeable degree.

e.g. A small but significant number of 11-year-olds are illiterate.
数量不多但仍有相当一部分 11 岁孩子是文盲。
e.g. ...foods that offer a significant amount of protein...
富含蛋白质的食物

形容词各种各样的; 多方面的; 许多的; 各个的，个别的

1. 各种各样的;不同种类的
If you say that there are various things, you mean there are several different things of the type mentioned.

e.g. His plan is to spread the capital between various building society accounts...
他打算把资金分散存到不同的购房互助会的账户上。
e.g. The school has received various grants from the education department.
学校得到了教育部门的多项资助。

2. 迥异的;千差万别的
If a number of things are described as various, they are very different from one another.

e.g. The methods are many and various.
方法很多且各不相同。
e.g. ...the country's rich and various heritage.
该国丰富多样的传统