before_sent:  Our extensive experiments show that our method can improve the performance of both understanding and generation tasks and achieves the state-of-the art results .
before_sent_with_intent: <meaning-changed>  Our extensive experiments show that our method can improve the performance of both understanding and generation tasks and achieves the state-of-the art results .
after_sent:  Our extensive experiments show that our method can improve the performance of both understanding and generation tasks and achieves the UniVL can learn strong video-text representation and achieves state-of-the-art results on five downstream tasks .