n.直升飞机

The kids spent the afternoon in the backyard, flying their whirlybirds and having a great time.
孩子们在后院度过了一个下午，放飞他们的旋翼飞机，玩得很开心。
She designed a new model of whirlybird that could stay aloft for hours without any external power source.
她设计了一种新的旋翼飞机模型，可以在没有任何外部电源的情况下长时间停留在空中。
John's whirlybird was so well balanced that it could hover in one spot for minutes at a time.
约翰的旋翼飞机平衡得非常好，可以长时间停留在一个位置不动。
The school science club is building whirlybirds to compete in the annual model aircraft contest.
学校科学俱乐部正在制作旋翼飞机，准备参加一年一度的模型飞机比赛。
My brother gave me a whirlybird as a birthday present, and I've been enjoying flying it ever since.
我哥哥在我生日时送给我一个旋翼飞机，从那以后我就一直在享受飞行它。
The park has a designated area where people can launch their whirlybirds safely.
公园有一个指定区域，人们可以在那里安全地发射他们的旋翼飞机。
The engineering team is working on improving the efficiency of whirlybird propellers for better flight performance.
工程团队正在努力改进旋翼飞机螺旋桨的效率，以提高飞行性能。
The little boy was fascinated by the whirlybirds, watching them soar through the sky with admiration.
那个小男孩被旋翼飞机迷住了，他充满敬意地看着它们在天空中翱翔。
The grandpa shared his childhood memories of flying whirlybirds with his grandchildren during a family gathering.
爷爷在家庭聚会上与孙子孙女们分享了他童年放飞旋翼飞机的记忆。
The school's annual festival featured a competition for the best-designed whirlybird, attracting many participants.
学校的年度节日设有最佳设计旋翼飞机的比赛，吸引了许多参赛者。