★ significant
① adj. 重要的;(意义)重大的
a highly significant discovery
具有极其重大意义的发现
（2019浙江卷）
As a child, Adeline couldn’t understand why the medal was so significant.
小时候，艾德琳不明白为何那个勋章如此重要。
②(数量)大的;显著的
（2019全国卷I 完形）
The environmental challenges are significant but the efforts made by the Tanzania National Park Authority seem to be paying off.
环境方面的挑战的巨大的，但是坦桑尼亚国家公园的管理部门所做的努力还是值得的。
2008重庆
They are spending a significant amount of time in fruitless efforts as they multitask.
他们同时做几件事时，耗费了大量时间却徒劳无益。
It is significant that girls generally do better in examinations than boys.
很明显，女生在考试中的表现通常好于男生。
★ significantly adv 重大地;显著地;明显地
（2011湖南卷）
Since that first attempt I had been jogging regularly and was significantly fitter.
自从尝试了第一次，我就一直坚持慢跑，身体明显好多了。
★ significance n 重要性;(意义)重大
（2011浙江卷）
All the members should realize the value and significance of what they are going to do.所有成员都应该认识到他们将要做的事情的价值和重要性。