→ airyptt:Sorry, I am using an iPad now... 09/14 12:41
Some anthropologists believe that the genetic homogeneity evident in the
world's people is the result of a "population bottleneck"—at some time in
the past our ancestors suffered an event, greatly reducing their numbers and
thus our genetic variation.
(A) at some time in the past our ancestors suffered an event, greatly
reducing their numbers
Greatly reducing is awakard and this is modifying event, thus incorrect.
(B) that at some time in the past our ancestors suffered an event that
greatly reduced their numbers
(C) that some time in the past our ancestors suffered an event so that their
numbers were greatly reduced,
were greatly reduced, and thus our...
Awakard, wordy
(D) some time in the past our ancestors suffered an event from which their
numbers were greatly reduced
Suffered from is a phrasal verb, cannot be interrupted.
(E) some time in the past, that our ancestors suffered an event so as to
reduce their numbers greatly,
So as to, wrong usage
我想請問破折號的用法，ＯＧ說法是：
Scientists believe that X—[in other words,] that Y. In this construction, X
and Y are parallel clauses.
If you present a noun phrase/clause after the ---, this is fine.
※ 引述《maitri (做人呢，最要緊就是開心)》之銘言：
: Some anthropologists believe that the genetic homogeneity evident in the
: world's people is the result of a "population bottleneck"—at some time in
: the past our ancestors suffered an event, greatly reducing their numbers and
: thus our genetic variation.
: (A) at some time in the past our ancestors suffered an event, greatly
: reducing their numbers
: (B) that at some time in the past our ancestors suffered an event that
: greatly reduced their numbers
: (C) that some time in the past our ancestors suffered an event so that their
: numbers were greatly reduced,
: (D) some time in the past our ancestors suffered an event from which their
: numbers were greatly reduced
: (E) some time in the past, that our ancestors suffered an event so as to
: reduce their numbers greatly,
: 我想請問破折號的用法，ＯＧ說法是：
: Scientists believe that X—[in other words,] that Y. In this construction, X
: and Y are parallel clauses.
: 我知道破折號是解釋補充，用that Y解釋that X，
: 所以兩者需平行的意思嗎？
: 因為一看到parallel，我馬上就想到用"and"來連接，
: 可答案沒這選項～
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