brittle、fragile与frail这些形容词都含有“易碎的”之意。
brittle : 指没有弹性或伸缩性的脆性材料，暗示受压或被扭曲时易碎。
- As you get older your bones become increasingly brittle.
随着年龄增长，人的骨头变得越来越脆。 - The pond was covered in a brittle layer of ice.
池塘上结了薄薄的一层冰。
fragile : 除指易碎外，还指人身体虚弱，动辄就得病。
- Be careful with that vase - it's very fragile.
拿那只花瓶要小心——它很容易碎。 - The assassination could do serious damage to the fragile peace agreement that was signed last month.
这起行刺事件可能会对上月签署的脆弱的和平协定造成严重损害。
frail : 多指人体虚弱，也指某物不耐用，易碎易损。
- 他那辆不坚实的车在弯道处失去控制，一头扎下堤岸。
His frail car went out of control on a bend and plummeted down an embankment. - 她那睿智的老祖母已逐渐衰弱到无法独居。
Her sage old grandmother was becoming too frail to live alone.
（拓展学习：小词详解 | frail）
