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1·Avoid bypaths; the turnpike leading to accomplishment usually runs straight; it's safer, and free from landslides.

通往成功的高速路一般都是直线行驶的，它比较安全，而且没有塌方的危险。

2·There are, of course, detours and bypaths that one can follow, but essentially the world of the 1920's is still intact.

当然，如今这其中不乏死路和弯路，但是大体而言，1920年的巴黎仍然完整。