我们富有成效的讨论催生了几项创新想法。

Our ___profitable discussion led to several innovative ideas.

她通过学习一门新语言有效地利用了时间。

She made ___profitable use of her time by learning a new language.

在获得实用技能方面，这次研讨会非常有帮助。

The workshop was highly ___profitable in terms of gaining practical skills.