This is useful for creating effects such as flocks of birds, arrows, crowds, trajectories, bullets, or anything that needs a specific orientation relative to its movement.是什么意思_This is useful for creating effects such as flocks of birds, arrows, crowds, trajectories, bullets, or anything that needs a specific orientation relative to its movement.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句