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1.The test is very simple – just a finger prick blood sample can tell doctors which children are most at risk.
at risk有危险
The crisis could well place the relationship at risk.
这场危机可能会使这一关系有破裂的危险。
2.The more we learn about heart disease and stroke in adults, the more we know that the process begins in childhood and progresses over time.
over time随着时间的过去
The social significance of religion has changed over time.
宗教的社会意义随着时间的变迁已经发生了变化。
