山姆不仅失去了工作,而且失去了双腿,他只好靠社会救济度过余生。
Our first objective was to solve the problem of food and clothing, which we have now done.
On no account can we ignore the value of knowledge.
China is a large country with four-fifths of the population engaged in agriculture, but only one tenth of the land is farmland, the rest being mountains, forests and places for urban and other uses.