Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/3cf6a60d68f5e0c86215569e455eac2a.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 potholer例句_potholer英汉例句_potholer双解例句_按摩法牛津词典
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the potholer. 這種謹慎是必要的，因爲洞穴勘探家將要麪臨的睏難的性質， 是不可能預見的。