| [/trɔf; US trɔːf; trɔf/] n 用法:
1 long narrow open box for animals to feed or drink from 饲料槽; 饮水槽. =>illus at pig 见 pig 插图. 用法:
2 shallow channel that allows water, etc to drain away 排水沟. 用法:
3 low area between two waves or ridges 波谷; 低谷. =>illus at surf 见 surf 插图. 用法:
4 (in meteorology) long narrow region of low atmospheric pressure between two regions of higher pressure （气象）低压槽. Cf 参看 ridge 3. |