One would expect them to know their parts by heart and never have cause to falter.
人们以为，这些演员一定会把台词背得烂熟，绝不会临场结巴的，
新概念英语第三册
Lesson 22 By heart
📚 句中词汇解析
从本句中提取的重要词汇
vt. 期望;预料;要求;认为（某事）会发生;
vi. 预期;期待;怀胎;怀孕;
💡 ex出+pect=spect看→看出去→期待
"We expect writers to produce more and better works."
我们期望作家们写出更多更好的作品.
近义：wait, await, previse, bide, hope, contemplate
v. 知道;了解;认识;确信;
n. 知情;
💡 知道know的人爱说自己不no知道
"Do you know your ABC?"
你认识所有的字母吗？
近义：learn, understand, get, cognize, comprehend, meet
n. 心，心脏;感情;要点;胸部;
vt. 鼓励;激励;
vi. 结心;
💡 医生查病听(hear) 心脏跳(t)
"abnormalities of the heart"
心脏异常
近义：hub, nucleus, root, bottom, bowels, center
n. 原因;动机;理由;事业;
vt. 成为…的原因;导致;引起;使遭受;
💡 不是(be)因为(because) 引起的
"The martyr laid down his life for the cause of national independence."
这位烈士是为了民族独立的事业而献身的.
近义：induce, inspire, instigate, instill, make, occasion
反义：hinder, obstruct, oppose, avert, preclude, prevent
vi. （嗓音）颤抖;支吾其词;蹒跚;摇晃;
n. 支吾，结巴;踌躇，不稳;摇晃;颤抖;
"His voice began to falter."
他的声音开始发颤.
近义：hesitate, quiver, slacken, stagger, teeter, totter
反义：object, oppose, rebel, recalcitrate, revolt, stand