词典
例句
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do sth in revenge
do sth of necessity
do sth on one's own responsibility
do sth on purpose
do sth on spec
do sth on the quiet
do sth on the sly
do sth out of revenge
do sth out of vanity
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do sth on spec
➞
do sth on spec
Definitions
[1] 投机地做某事
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do sth on spec