| 释义 |
ˈupcurrent, n.
[up- 2.]
A rising current of air.
1909F. W. Lanchester in Flight 22 May 296/1 When a plane falls normally through a vertical path, there is set up around the edges an up-current of air. 1921Flight 8 Sept. 604/1 This map brings out very clearly..the manner in which Klemperer followed the valleys and took advantage of the gusts, up-currents, etc., which were caused by the nature of the country. 1931Air Ann. Brit. Empire 30 The most elementary form of up-currents are caused by the deflection of winds over hills..necessary for soaring flight. 1953N. Tinbergen Herring Gull's World iv. 39 The influence of the upcurrent on their flight is seen most impressively when..one forces the gulls to make a detour out over the beach. 1979B. L. C. Johnson Pakistan iv. 55/1 It limits the scope for upcurrents in the surface monsoon air stream to rise very high. |