Going back and forth between two homes can be tough, especially if parents live far apart.
在两个家之间搬来搬去很不容易，特别是当父母的住处相距遥远时。
However, on many occasions Agile teams have a tough time deciding between the two.
然而，在很多情况下，敏捷团队会难以在二者之间做出选择。
A tough non-absorbable stitch is used to bring together the two skin edges and these are left in for between a week and 10 days.
切口两边的皮肤边缘可用较硬不可吸收的缝线缝合，之后观察一周至10天。
My two long bony toes have a super-tough piece of skin stretched between them.
我那长长的骨趾间，有超强韧的皮肤可以延展；
My two long bony toes have a super-tough piece of skin stretched between them.
我那长长的骨趾间，有超强韧的皮肤可以延展；
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