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She was always smiling and positive, even on days when Michael was very ill or received bad news about blood counts.

即使是在迈克尔病情严重或血压不稳定的时候，她也总是面带微笑，表现得很是非常积极乐观。

youdao

In fact, smiling can boost your mood and even your immune system.

事实上，笑可以振作精神，增强免疫系统。

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"She responded very well to that, " he said, smiling and even tearing up a bit.

CNN: STORY HIGHLIGHTS

The secrecy was serious: when he spoke of spirits, his smiling face became deadly sober and even scared.

ECONOMIST: Mau Piailug

"We saw a steeper decline in heart rate and a faster physiological stress recovery when they were smiling, " even though the participants weren't aware they were making facial expressions, says Sarah Pressman, co-author of the study and an assistant psychology professor at University of California, Irvine.

WSJ: Stress-Busting Smiles