1. It is true during their explorations they often faced difficulties and dangers of the most perilous nature.
    确实在探险中, 他们经常面临着各种最有危险性的艰难和险阻.

2. It is true that during their explorations they often faced difficulties and dangers of the most perilous nature,
    确实，在探险中他们经常遇到惊心动魄的困难和危险，

3. In my field — finance and securities — I am often asked by Westerners how Nomura Securities has managed to escape the paper traffic jam that American firms have faced.
    在我的工作领域——金融和证券业，常有西方人问我，野村证券公司是如何避免美国公司所面临的交易单流通堵塞的。

4. Faced with sharing a dinner of raw pet food with the cat, many people in wheelchairs I know bleed the system for a few extra dollars.
    我认识的许多坐轮椅的人面临与宠物猫分吃生猫食的窘境，都会向福利机构多榨取几美元。