The term biological clock is applied to the means which living __1__
6 A; n3 _" ^, u things adjust their activity patterns, without any obvious cue, the __2__. W- q. L1 E2 S! d$ E
time of day, or the month, or the year. They are affected but little,3 Z) C$ E" x3 W5 G- G, b2 @9 U
if at all, by drugs, chemicals, or wide temperature differences—( `: J4 V( ~6 a% `5 r, z1 e
factors may alter substantially the rates of all ordinary processes of __3__- L( F3 u+ P2 E4 J9 h3 r: y
the body.2 E0 ~" Z9 Y# u; V
The nature of the biological clocks mechanism is still a mystery __4__2 U, M# B' J( P% c! u8 M
two quite different theories have been advanced to account to __5__9 w$ g) }4 @9 p- ?+ `7 j- i
them. According to the first of these theories, each individual have/ ?9 o! j- q; F/ I9 ^% |; w* c, O) J2 A
envolved, aided by natural selection, an adaptation to the rhythmic __6__3 k. n) Q3 d( a8 C( n; F/ B! a
environment. It has now become independent on the environment __7__& C* o# C" E9 V6 l7 L, i
according to this view, the clocks are not perfect timers.
4 u# x# V& ]- p4 _7 m They require regular corrections by the natural light and tide cycles0 r) P4 `& `8 W* M1 F, Q, M: R
and the changed lengths of the day throughout the year. __8__# w* E& P0 L C; Z/ E
The other theory holds up living things react continuously to __9__
7 W: [- G8 I8 W. @: v their rhythmic physical environment. The setting of their biological
* p* E6 o# X! m: d ^& @' z clocks, therefore, involves a constant adjustment to subtle clocks/ o5 q h7 i5 p/ e, Y
which are potential perfect times. __10__
' Y. t5 _# u/ l$ F 答案:; C" v+ W2 ^0 U6 C t
1.^which—by: ~, T* P E% W3 K9 X( M" D
by the means of 指“通过……方式”,如果吧means作为先行词,后面定语从句就要有by,这句话意思是“生物钟指的是生物调节其行为的方式”。
, N4 p4 y9 c8 m( x6 r/ G 2.^the time – to5 M0 ^% I1 H; x% G
adjust A to B 指A适应B,这句指“在没有任何提示的情况下,是自己的行为方式适应外界的时间”。" _) o3 M9 U- m; X! f
3.factors^--which/ that: T! x. ?) y4 R" g$ o; w" Z* c! s
这是一个定语从句,修饰factors,which/that做主语不能省略。" H# {2 L: o! ?% Y5 R! y9 C
4.clocks—clock’s/ i* _; E7 w4 u) z3 ]7 ?: p" ?2 t
5.to(第二个)--for
$ P1 N7 J! |* h! a2 I8 Q account for意思是explain,为固定词组。6 c) d! \4 Y, [* N/ y2 W% `9 q
6.^an—as" m1 n1 J1 _ n. W" H
这句话意思是“这些是由于对规律环境的适应进化而来的”。% C, d' h% g0 P4 L( ]* v& B: W
7.on—of1 [# K! f( S: T9 B% ]$ t6 F
be independent of 意思是“独立于……,不依赖……”
8 c4 V+ Z- {9 ]8 y) Q8 U 8.changed—changing/ @ Y# `2 c+ F3 Q, \$ F4 u
文章要表达的是“变化着的长度”,应该用现在分词。: D; Z" Y, ?! X! x; {5 C/ P
9. up去掉或者将up改为that8 _: y" A- G' `& ?$ ?
hold本身就有“持……观点”的意思。$ ` k$ o, n8 d( J8 r9 p
10. potential—potentially |