同根派生 polar front相关词英汉例句用作名詞 (n.)Pollen grain trilobate in polar view.花粉粒三裂在極麪觀。The angles refer to the polar view angle, i.e. the angle measured from the vertical.角涉及到極麪觀的角,例如垂直物上測量的角。polar front更多例句