VOA慢速英语:Scientists Looking for Life on Mars

短语讲解：

1. But scientists continue to look for evidence.

look for 寻找（某人或某物）
例句：I look for you everywhere continuously!
我一直在到处找你！

2. And boron is interesting because in some scenarios for the origin of life, boron is able to help catalyze some of the reactions that build materials that could eventually become part of RNA molecules.

be able to 能够
例句：He will be able to take up his normal routine shortly.
他不久就能处理日常事务。

3. That, in turn, could finally prove that we are not alone.

in turn 依次; 转而; 轮流地; 相应地
例句：His policy was to beat each enemy in turn.
他的方针是各个击破。