深思熟虑

例句：

1. 1.She contemplated the decision for hoursbefore making a choice.
   她深思熟虑了决定几个小时后做出了选择。
2. 2. The scientist was deeplycontemplating the implications of his findings.
   科学家正在深深地思考他的发现的含义。
3. 3. Hecontemplated the future with great anticipation.
   他满怀期待地思考着未来。