每周吃四到五次鱼能够保证宇航员骨质健康。
Eating four to five servings of fish per week can ensure better bone health for astronauts.
一般一周送两次鱼，周二至周五是最可能的。
The fish deliveries are usually twice a week, so Tuesday through Friday are great days. Or ask the restaurant when they get theirs.
事实上，美国心脏协会建议每人每周吃两次鱼。
In fact the American Heart Association recommends that everyone eat fish twice weekly.
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