tentative

After several tentatives, she finally mastered the dance move.

用法提示：此处 tentatives 为名词复数，表示“尝试”。

The scientist's first tentative failed, so she redesigned the experiment.

用法提示：此处 tentative 为名词单数，表示“试验”。

He treated the speech as a tentative, not a final performance.

用法提示：此处 tentative 为名词，意为“尝试”。