Telephone service for the ordinary civilian was even worse. If allowed to talk at all, he could not generally make a phone callofmore than eight miles.
普通老百姓打电话更难，就是准许他打，一般也打不到八英里以外。
2
But the callof the wild was simply too strong and so he set off once more.
但大自然的吸引力实在太大了，所以他又一次出发了。
《柯林斯英汉双解大词典》
3
The idea is that we are taking more out of what you might call the planet's environmental bank balance than it can sustain; we are living beyond our ecological means.