| 单词 | leader stroke |
| 释义 | > as lemmasleader stroke leader stroke n. (see sense 21). leader stroke 21. Meteorology. In full, leader stroke. A preliminary stroke of lightning that ionizes the path taken by the much brighter return stroke that follows. ΘΚΠ the world > matter > light > naturally occurring light > [noun] > lightning > bead or forked lightning > flash of laitc900 slaughta1300 levinc1300 fire-slaughta1400 flaughta1400 thunderboltc1440 fudder1513 fire-flaughta1522 flag of firea1522 bolt1535 strokea1542 lightning bolta1560 lightning1560 fire-bolt?1562 fulgur1563 fulmen1563 thunder-thump1563 light-bolt1582 fire-flash1586 blaze1590 flake1590 clap1591 blastc1665 glade1744 streak1781 thunder-ball1820 leader stroke1934 the world > the earth > weather and the atmosphere > weather > bad weather > thunder and lightning > [noun] > lightning > stroke of > preliminary leader stroke1934 1934 Schonland & Collens in Proc. Royal Soc. A. 143 657 These preliminary downward strokes will be referred to as leader strokes and the upward strokes which follow them will be called main strokes. 1934 Schonland & Collens in Proc. Royal Soc. A. 143 657 Sometimes the leader is so faint that a portion only of the track can be seen. 1937 Jrnl. Inst. Electr. Engineers 81 6/2 Immediately the stepped leader stroke reaches the earth the..return stroke begins to travel..from earth to cloud. 1937 Jrnl. Inst. Electr. Engineers 81 6/2 The leaders to the second and subsequent strokes of a flash usually travel from cloud to ground in a single flight. 1963 Meteorol. Gloss. (Meteorol. Office) (ed. 4) 154 Leader strokes directed upwards from ground to cloud may predominate in the case of very high structures. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) VII. 510/1 Cloud-to-cloud strokes also involve a step leader and main return stroke. < as lemmas |
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