transportation是美式英语，等于transport，都是运输的意思。但transportation是不可数名词，不能加复数。
transportation既可表示可数也可以表示不可数。
transportation：
n.(旧时的)流放;运输;运输系统;运输工具 扩展资料
They've also slashed state subsidies to utilities and transportation.
他们还大幅削减了对公共事业和交通运输的政府补贴。
Relief agencies say the immediate problem is not a lack of food, but transportation.
救援机构称最紧迫的问题不是食物匮乏，而是运输不畅。
Campuses are usually accessible by public transportation.
通常乘坐公共交通即可到达各个校区。
The strawberries are kept in cold storage to prevent them spoiling during transportation.
草莓在运输过程中要冷藏，以防止变质。
