"arrow-maker," early 14c. (as a surname attested from 1203), from Old French flechier "maker of arrows," from fleche "arrow," which is probably from Frankish, from Proto-Germanic *fleug-ika- (compare Old Low German fliuca, Middle Dutch vliecke), from PIE *pleuk- "to fly," extended form of root *pleu- "to flow" (see pluvial).
1. The conjugate descent method introduced by Fletcher ( 1987 ) is one of the conjugate gradient methods.
共轭下降法是由Fletcher ( 1987 ) 提出的一个共轭梯度法.
2. Fletcher admits his side must now ensure they stick with Jose Mourinho's men throughout the campaign.
3. Graham Fletcher was unimpressed with the idea of filling in a lengthy questionnaire.
4. In between appearances on TV and radio broadcasts, Mr. Fletcher holds an impromptu news conference.