Despite a number of setbacks, they persevered in their attempts to fly around the world in a balloon.
虽屡遭挫折，他们仍不断尝试乘气球环游世界。
They faced impossible odds, and yet somehow, they persevered.
他们面对不可思议的艰难，然而他们坚持过来了。
Even after they were freed, African Americans persevered through conditions that were separate and not equal, before winning full and equal rights.
非洲裔美国人即使在获得自由后依然生活在被隔离和不平等的条件下，他们经过不懈努力才最终赢得全面、平等的权利。
Even after they were freed, African Americans persevered through conditions that were separate and not equal, before winning full and equal rights.
即使他们被解放以后，非洲裔美国人也和美国人经过一些分开的、不平等的条件，经过一段时间才争取到全面的平等权利。
Even after they were freed, African Americans persevered through conditions that were separate and not equal, before winning full and equal rights. None of this was easy.
即使他们被解放以后，非洲与美国人也和美国人经过一些分开的、不平等的条件，经过一段时间才争取到全面的平等权利，所有这些是不容易的。
Even after they were freed African Americans persevered through conditions that were separate and not equal before winning full and equal rights.
即使他们被解放以后，非洲裔美国人也和美国人经过一些分开的、不平等的条件，经过一段时间才争取到全面的平等权利。
Even after they were freed African Americans persevered through conditions that were separate and not equal before winning full and equal rights.
即使他们被解放以后，非洲裔美国人也和美国人经过一些分开的、不平等的条件，经过一段时间才争取到全面的平等权利。
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