英语翻译Never frown、 even when you are sad、 because you never kn

英语翻译Never frown ,even when you are sad ,because you never kn never frown ,even when you are sad because you will never kn Never frown,even when you are sad,because you ... Never frown ,even when you are sad ,because Never frown,even when you are sad,because 英语翻译"Never frown,even when you are sad,because you never kno 英语翻译Never frown,even when you are sad because you never know never frown,even when you are sad Never frown even when you are sad.because you never Known wh 英译汉 帮下忙 Never frown,even when you are sad,because you never Never frown,even when you are sad,because you never know who Never frown,even when you are sad because you never know who