The day-to-day coach doubled up as the confidante and the hitting partner.

这位日常教练既是知己又是击球伙伴。

The amazing thing about WeDo, is that all their products double up as things.

WeDo 的惊人之处在于，他们所有的产品都可以兼作物品。

Since he never weighed more than 100 lbs or 45 kg, James Madison doubles up as the lightest U. S. President in history.

他的体重从来没有超过 100 磅，也就是 45 千克，几乎是美国历史上体重最轻的总统。

From 2009 to 2018, when both men played for Spanish teams, every clash doubled up as a referendum on which man was the superior star.

从 2009 年到 2018 年， 当两人都为西班牙球队效力时，每一次交锋都变成了一场全民公决， 决定谁是更优秀的球星。