新概念英语第四册16-04

where…..---表原因 chance discoveries: 偶然的发现

part：作用 they do---chance discoveries

highly predictable： 高度可预测性 go to 达到

such….that ：如此,以至于 nature： 本性，特点

for instance： 比如说（插入语）

have great difficulty in obtaining technical or scientific books from libraries…..

他们有极大困难获得专业的科普书籍

difficulty=trouble

they are unwilling to： 他们不想这样做

enter ：进入，签名 sign ：签名=have sth. done

have taken out ：借书 for fear：(虚拟)唯恐，担心 trace： 踪迹

have a difficulty in =unwilling to do sth.不愿做…..

I have a difficulty shopping with you.(强调客观性)

=I am unwilling to shop with you.(更强调主观性)

as ：作为 for fear 唯恐（一见这个词，就是虚拟语气）

in case , lest+(should ) do

so as not to (口)

trace：=find:发现 trace the route:寻觅踪迹

undertaking：(=carry out) 从事 Cheshire:柴郡 shire = county 县，郡

to such an extent ：达到如此的效果

The student goes to such an extent that he is rude to his teacher.

...where chance discoveries play a much larger part than they do in physical and mechanical industries. Sometimes the secrecy goes to such an extent that the whole nature of the research cannot be mentioned. Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries because they are unwilling to have their names entered as having taken out such and such a book for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.