她乘雪橇穿越西伯利亚到达了堪察加半岛，行程共1.4万英里。She travelled 14,000 miles by sledge across Siberia to Kamchatka.他用尽全力拉减轻了重量的雪橇。He pulled the lightened sled with all his strength.雪橇可以按天租用。Skis are available for hire on a daily basis....
The magnetism and ferroelectricity were detected.在室温下探测到了共存的磁性和铁电性.On the other hand, a high remanent polarization indicates a strong ferroelectricity, which enhances piezoelectric properties.另一方面, 高的剩余极化强度Pr使材料铁电性的增强, 有...