In planning my drive to the airport, I'll factor in a "cushion" to allow for the unexpected, such as heavy traffic, or a flat tire.
计划去机场的时候，我会算进一段“缓冲时间”，以防不测，像是堵车啊，爆胎啊。
2
The self-flexing frame assures stability and cushion over rugged terrain, and the internal hydro-drive pedalling system is a closed system that ensures no loss of power up climbs or singletrack.