时隔多年，阿豪的母亲与大舅在越南碰面，前往故居。（受访者供图）
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Clean living conditions that lessen exposure to microorganisms are linked to an increase in allergies. Mouse data reveal how the environment affects allergic immune responses.
Webb's sharper view also hints at possible jets from the central star. The dark lane and the way gas appears to push outward near the top of the nebula suggest an ejection that may be shaping the cloud's symmetry, a common feature when aging stars throw material in opposite directions.