abbr. master attitude reference system 主要态度参考系统;midair retrieval system 中空恢复系统;military affiliated radio system 军用附属无线电系统;mathematics anxiety rating scale 数学焦虑等级刻度;
n. 毁坏，损坏，玷污( mar的名词复数 );
v. 毁坏，损坏，玷污( mar的第三人称单数 );
Fierce wars between Native Americans and European settlers broke out.
美洲土著人和欧洲殖民者之间发生了激烈的战争。
Each time you fail, start all over again.
每次你失败，再从头开始。
I think it is important to understand the relations between parents and their children. They spend time, energy and money in bringing up children and providing them with what they need. Then, as with young birds, the time comes for the young to leave. As