| 1. | Full unification took place only at the beginning of the twentieth century .
完全的统一只是在二十世纪开头才实现。 |
| 2. | He dominated the plant taxonomic world at the turn of the twentieth century .
他在二十世纪曾垄断了整个植物分类学界。 |
| 3. | His short stories of the 1960s are miracles of condensed observation .
他在二十世纪六十年代发表的短篇作品，都是观察入微的妙品。 |
| 4. | American literature burst on the international scene in the early decades of the twentieth century .
美国文学在二十世纪头一、二十年崛起于世界文坛。 |
| 5. | Before the early twentieth century, inheritance was considered to be a blending, a continuous variation .
在二十世纪以前，遗传被认为是一种融合的，连续的变异。 |
| 6. | Even the soaring prices of the early 1970s were not extraordinary by historical standards .
甚至在二十世纪七十年代初期出现猛烈上涨的价格，按历史标准衡量也不算是异常的。 |
| 7. | Most of our attention will be devoted to the special features of economic life in 20th century industrial nations .
我们大部分注意力将放在二十世纪工业国家的经济生活的特征上。 |
| 8. | It also gave rise to problems in the foundations of mathematics with which the twentieth century is still struggling .
它引出关于数学基础的许多问题，这些问题在二十世纪仍然进行着争论。 |
| 9. | "executive" is an americanism now firmly implanted in the british vocabulary, having triumphed there in the course of the nineteen-fifties .
“Executive”是个现在已在英国语汇中牢牢立住脚跟的美国词，它是在二十世纪五十年代在英国赢得地盘的。 |
| 10. | Take - aways became extremely popular in the 1980s
外卖在二十世纪八十年代空前流行。 |
