Every solid object will reflect a sound, varying according to the size and nature of the object.

任何固体者反射声音，反射的声音因物体的大小和性质的不同而不同。

The question became one of whether Man could control the disease he had invented.

现在的问题是，人类能否控制住这种人为的疾病。

From 1914 to 1924 he was supreme and unchallenged.

在1914年至1924年期间，他首屈一指，独霸影坛。

but although our faith in many of the things in which our forefathers fervently believed has weakened,

可是虽然我们对我们祖先笃信的许多事物已不太相信，

but our spiritual outlook would be different.

但人们的精神面貌将是另一个样子。

do in fact run out of energy in accordance with the second law of thermodynamics (whether the whole universe does so is a moot point at present).

也都会消耗完其能量（整个宇宙是否如此，目前尚有争论）。