Certain features of these engravings lead to the conclusion that they are of great age—geological changes had clearly happened after the designs had been made.
这些雕刻的某些特征让人得出它们年代久远的结论——这些设计完成之后显然有地质变化发生。
2
The process was self perpetuating and eventually lead to the Ice Age.
这个过程是自我延续的，最终导致了冰河时代。
3
The BFP can lead to better nutritional outcomes in children 12 to 59 months of age.