sailings
Sailing is the activity or sport of sailing boats.
There was swimming and sailing down on the lake.
有人在湖上游泳和划船。
Sailings are trips made by a ship carrying passengers.
Ferry companies are providing extra sailings from Calais.
轮渡公司加开了从加来出发的航班。
plain sailing
If you say that a task was not all plain sailing, you mean that it was not very easy.
Pregnancy wasn't all plain sailing and once again there were problems.
怀孕过程并非一帆风顺,这不,又出现了问题。