Material sphere of validity

material [mə'tɪrɪəl]

n. 材料，原料;素材;布，织物;适当人选; adj. 物质的;肉体的;重要的，决定性的;辩证的，推论的;

sphere [sfɪr]

n. 球（体）;（兴趣或活动的）范围;势力范围;天体，如行星或恒星; vt. 形成球体;包围，围绕;置于球面内部;

spher(ball)+e(名词后缀)→球；球体；天体；范围；地位

of [əv]

prep. 关于;属于…的;由…制成; aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];

validity [və'lɪdəti]

n. 有效，合法性;效力;正确，正当;正确性;

valid有效的+ity表名词→正确(性);有效(性)

Let me know by the end of the week.

这个周末前给我回音。

If one side fails to observe the contract,the other side is entitled to cancel it.

如果一方不履行合同协议，另一方则有权终止合同。

On the subject of reading, Francis Bacon, who lived at about the same time as shakespeare, wrote these words, Some books are to be tasted, others to be swallowed, and some few to be chewed and digested. This good advice shows how it is possible to read

“有些书是应当尝尝滋味的，有些书是应当吞食下去的，有少数书是应当咀嚼和消化的。”这个忠告很好，它表明可以用不同的方法来阅读不同类型的书。