Cooking dinner for the entire family is not so easy.
给全家人做晚餐真不是件容易的事。
Won''t you iron this shirt for me?
可以帮我烫这件衬衫吗?
Our knowledge of the oceans a hundred years ago was confined to the two-dimensional shape of the sea surface and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land.