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O
observe
v.
评论
(6A)
◆
obsessive
adj.
着迷的
(5A)
obstacle
n.
障碍
(5B)
occur
v.
发生
(1B)
odd
adj.
偶尔的
(8A)
◆
ogre
n.
(使说中)极可怕的人
(8A)
◆
omelet
n.
煎蛋卷
(2B)
on board
在船(车、飞机)上
(4A)
on the basis of
依据
(1A)
on the phone
打电话
(7B)
◆
one-off
adj.
一次性的
(8A)
opening
n.
(某人做或说谋事的)良机、机遇
(2L&T)
optimist
n.
乐观主义者
(7A)
option
n.
选择
(4CS)
or so
大约
(8A)
out of reach
达不到
(6B)
outlet
n.
渠道
(3B)
◆
outrace
v.
超过
(8B)
◆
outrun
v
比···跑得快
(4B)
◆
ovation
n.
喝彩
(5B)
overhead
adj.
在···头顶上的
(4B)
▲
overweight
adj.
超重的
(6B)
©Experiencing English(2nd Edition)2007