Susan: Yeah, and we all know what a challenge that is! 好吧,我们都知道那是个极大的挑战。
But can they now adapt to the new challenge - 然而如今面对新的挑战
This is her first major challenge as a mother. 这是当妈妈的第一个大挑战
The challenge is to find your niche. 难的是如何寻找自己的一席之地
Keeping the intruders away is a daily challenge. 每天都上演着入侵驱逐战
has come to challenge the resident alpha male. 前来挑战这块领地的雄性首领
it has to face one major challenge. 他不得不面对一个巨大的挑战
these dolphins have taken on an ever tougher challenge. 这些海豚面临着一个巨大挑战
For them, finding food on the plains is an even greater challenge. 对于狼来说 在茫茫大草原上寻食甚至更为艰辛