several things remain to be

several things remain to be remain to be settled remain to be 用法 为什么是remain to be seen 而不是remain to see remain seated和remain to be seated有什么不同 remain stuck 和remain to be stuck有什么区别. remain to be done和remain seated 区别. remain后面为什么跟了to be remain to be down 的意思 remain done ,remain to be done以及remain doing 的区别 lots things to be remain to be seen为什么等于appear/seem to be