Once couples fall in love and settle down, they fall out of the habit of making an effort.
两人一旦坠入爱河、感情稳定下来，就不再努力了。
He argues that the fall in child mortality should be calculated over a slightly longer period, so the annual fall works out at 5.9%, not 7.8%, as in the Lancet.
他提出儿童死亡率要在较长一点的时间段内计算，这么一来年下降率就应该是5.9%，而不是《柳叶刀》所谓的7.8%。
Based on the existing unsteady seepage program for earth DAMS with fall in water level, unsteady seepage program with rise and fall in water level is worked out.
在库水位下降的土坝非稳定渗流计算程序的基础上，编制了库水位升、降的非稳定渗流计算程序。
Her baby teeth stay loose for a long time. They don't seem to fall out fast enough. When they finally fall out, it still takes a long time for the new teeth to grow in.
她的乳牙松动了很长时间，看来也不很快脱落，就是脱落了，新牙还要很久才长出来。
Her baby teeth stay loose for a long time. They don't seem to fall out fast enough. When they finally fall out, it still takes a long time for the new teeth to grow in.
她的乳牙松动了很长时间，看来也不很快脱落，就是脱落了，新牙还要很久才长出来。
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