Without their outer casing, they would never have mastered life in the open.

如果没有外部癿保护性外套，他们绝丌可能在开阔地上征服生活。

youdao

Without their outer casing, they would never have mastered life in the open.

如果没有外部癿保护性外套，他们绝丌可能在开阔地上征服生活。

youdao