245. As the trade winds lessen in strength, the ocean temperatures rise, causing the Peru current flowing in from the east to warm up by as much as 5℃.

随着信风强度的减弱，海洋温度升高，导致从东部流过来的秘鲁洋流温度升高5摄氏度。

本句的主干是temperatures rise。As the trade winds lessen in strength为状语从句；causing...为伴随状语，其中flowing in from the east为current的后置定语，flow和current之间为主动关系；by...为程度状语。trade wind的意思是“信风”。

flow in的意思是“不断涌入”。如：

The election results flowed in throughout the night. 整夜不断传来各项选举结果。

warm up此处意思是“使温度升高”。

warm up有以下几个常见含义：

“做准备活动”。如：

You have to warm up before swimming. 在游泳之前你得先做准备活动热身。

“（机器等）预热”。如：

Don't forget to let the car warm up. 别忘了让汽车预热。

“使更活跃”。如：

The party has begun to warm up. 晚会开始热闹起来。