1) Swallows were darting through the air .
燕子在空中穿飞。
2) Swallows are darting through the air.
燕子在空中掠过.
3) Swallows were darting through the air.
燕子在空中掠过。
4) Swallows were darting through the clouds.
燕子穿云急飞。
5) Kites are gliding in the air.
风筝在空中飞翔。
6) The banner flourished in the wind.
旗帜在空中飞舞
补充资料：旗帜
①旗子的总称：高焰旗帜翻。②比喻榜样：雷锋是时代青年的一面旗帜。③比喻某种思想、学说或政治力量：十月革命的旗帜是不可战胜的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条