For most individuals, mastery of the subject matter will require a substantial commitment of time and effort.
对大多数人来说，掌握科目的主要内容还是需要投入大量时间和精力的。
You might be keen to take a sabbatical or make a substantial commitment of time or energy as a volunteer. You might want to change to a new career that you'd love - but that would bring in less money.
你可能想要一个休假或者自愿做出时间上或精力上的重大牺牲。
Adding dynamic UI features requires anything from a few minutes' work to a substantial time commitment.
添加动态特性需要从几分钟的工作到大量时间的花费不等。
Not only is there a substantial financial commitment involved, but also there is a large amount of time and effort invested .
这必须要与客观的资金支持，还要有巨大的时间和努力的投入。
Not only is there a substantial financial commitment involved, but also there is a large amount of time and effort invested .
这必须要与客观的资金支持，还要有巨大的时间和努力的投入。
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