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讲解：
back sb/sth
帮助；支持:
Her parents backed her in her choice of career.
她父母支持她的职业选择。
worthy (of sb / sth)
值得(或应得)…的:
A number of the report's findings are worthy of note.
这份报告里有些调查结果值得注意。
develop sth
开发；研制:
The company develops and markets new software.
这个公司开发并销售新软件。
leap (in sth)
骤变；剧增；激增:
This company had a leap in profits.
这个公司的利润跃升。
by / in leaps and bounds
非常迅速；飞跃地；突飞猛进；大量地:
Her health has improved in leaps and bounds.
她的健康已迅速好转。
