They acted their parts infallibly .

他们准确无误地扮演了自己的角色。

He is infallibly cheerful despite his difficulties .

尽管遇到困难他也总是乐观的。

Rudimentary organs will speak infallibly with respect to the nature of long-lost structures .

初期器官可以确定无误地表示出久以失去的构造的性质。

Whenever we sit down to eat someone infallibly phones .

无论我们什么时候坐下来吃饭，总有人会打来电话。

How can we be sure the gospel story is an accurate and infallibly recorded historical account ?

我们怎样才能确保对福音的故事是一个历史记录的准确和无误？