在叶鞘裹住的幼叶下部呈现螺旋状.A spiral deformation occured in the lower part of the young leaf enclosed in the sheath.包裹最低两个茎节的叶鞘也应坚硬.The leaf sheath enclosing the lowest two internodes should be stiff too.本实验以高秆野生稻的幼嫩叶鞘和茎为材料.Leaf she...
an indoor swimming pool室内游泳池Indoor pollution falls into two categories, that which we can see or smell, and pollution which is invisible and produces no odour.室内污染分为两种：一种是我们能看得见或闻得着的，另一种是无色无味的。The spa has 6 indoor pools,...
The sidewalk abutted on the river.人行道紧挨着河川.Some one was shuffling by on the sidewalk.外面的人行道上有人拖着脚走过.Gerta and Gillie ran down the sidewalk with some other children in a game of hide - and - seek.歌塔和吉利与其他一些小孩沿着便道跑过去,玩捉迷藏....