记忆方法
双解例句
小知识
A frontier represents uncharted territory. It could be a remote piece of land or a new field of study, but if someone calls it “the frontier,” you are challenged to explore it.
The noun frontier has several meanings. It can refer to the wilderness at the edge of a settled area (picture covered wagons pushing westward) or it can mean a field of study that has not yet been explored (picture genetically engineering pet dinosaurs). Deriving from “the front line of an army,” a frontier can be thought of as an offensive line in a battle — always pushing forward, trying to conquer new territory.
实用短语
常用短语
单词用法
border:多指国与国之间或两地区的分界处,即分界线附近的边缘部分。
bounds:常与boundary换用,指土地边界,但意思不如boundary明确,主要用于抽象事物和文学作品中。
boundary:侧重地图上正式标定的、双方遵守的边界,也可指较小行政单位间的界线。
frontier:指两国接壤的前沿地区,属于各国的国境和边疆,多指设防的边界。
limit:含义广泛,常用作复数。指任何界限、范围、分界线外面的部分,可指有形或无形的东西。
frontier trade边境贸易
efficient frontier有效边界;效率前缘
frontier orbital前沿轨道
词根词缀
后缀: -ier
表名词,”人或物”
n.
barrier 栅栏,屏障;障碍[物]barr栏+ier人或物→n.栅栏,屏障;障碍[物]
cashier 收银员,出纳员cash现金+ier人或物→n.收银员,出纳员
cavalier 骑士,武士caval马+ier人或物→n.骑士,武士
chandelier 枝形吊灯[烛台]chandel=candle蜡烛+ier人或物→n.枝形吊灯[烛台]
financier 财政家,金融家finance金融+ier人或物→n.财政家,金融家
frontier 国境,边境;尖端,新领域front前面+ier人或物→n.国境,边境;尖端,新领域
pacifier 调停者,和解人pacify调解+ier人或物→pacifier调停者,和解人