英語四級閱讀關(guān)鍵句：245. As the trade winds lessen in st

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℃.

譯文

隨著信風強度的減弱，海洋溫度升高，導致從東部流過來的秘魯洋流溫度升高5攝氏度。

點睛

本句的主干是temperatures rise。As the trade winds lessen in strength為狀語從句；causing...為伴隨狀語，其中flowing in from the east為current的后置定語，flow和current之間為主動關(guān)系；by...為程度狀語。trade wind的意思是“信風”。

flow in的意思是“不斷涌入”。如：

The election results flowed in throughout the night. 整夜不斷傳來各項選舉結(jié)果。

warm up此處意思是“使溫度升高”。

考點歸納

warm up有以下幾個常見含義：

“做準備活動”。如：

You have to warm up before swimming. 在游泳之前你得先做準備活動熱身。

“（機器等）預熱”。如：

Don't forget to let the car warm up. 別忘了讓汽車預熱。

“使更活躍”。如：

The party has begun to warm up. 晚會開始熱鬧起來。