单词	thunderhead
释义	thunderhead /ˈθʌndəhɛd / noun A rounded, projecting head of a cumulus cloud, which portends a thunderstorm.But Ben recognized the thunderheads, the big cumulus clouds, that were drifting our way.... As air rises in a large cumulonimbus or thunderhead cloud condensation occurs and all three forms of water are present. We'll follow mountain-lion tracks and watch from remote plateaus as distant puffs of cloud build into towering thunderheads.
随便看	conversion van convert converted rice converter converter reactor convertibility convertible convertor convert something to one's own use convex convex envelope convex hull convexity convexly convexo-concave convexo-convex convex programming convey conveyable conveyance conveyancer conveyancing conveyer conveyor conveyor belt

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