by heart 用心学习，记住 2
combine
结合/联合3
in that circumstances 如果那样的话 4
replace
keep a record of 记录 6
comment on
at least 至少 8
expect of/from
当中期待 9
in return 作为回报10
the survey on
的调查 11
differ in
方面不同12
emerge from
be satisfied with
roles 扮演
的角色 15
lean over
弯下身子 俯身于
turn out 结果是，证明是 17
in silence 在沉默中18
burst into laughter 突然笑出声来 19
concentrate on
be replaced by 被
所取代 21
for the purpose of
distinguish
communicate with
one another 彼此，相互 25
by means of
at the approach of
将到的时候 27
differ from
for instance 举例来说 29
divide
