secondary circle的用法和样例：
例句
- This lack of maritime surveillance and disaster preparedness is not unique to the great circle route, but the nasty local conditions are.
对海运监督的缺失和对海难准备工作的不足，对大圆航线来说并不少见，糟糕的当地情况亦是如此。 - Remarkable is the design-the glass, each piece of glass has a great circle, which is the magpie as paper cutting designs, auspicious motifs sticks.
令人赞叹的是四方联玻璃中的图案，每块玻璃上都有一个大圆，里面有剪纸式样的喜鹊登枝等吉祥图案。
