马道头村，广西钦州市灵山县旧州镇石桥村的一个自然村屯。昔日，群山环抱，鲜为人知；如今，因平陆运河第一级枢纽——马道枢纽在此建设，有了些名气。
\(\pi_1(S^1 \vee S^1) \cong F_2\)，推荐阅读搜狗输入法2026获取更多信息
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Today, this ability to maintain a stable body temperature—called homeothermy—is known to exist among myriad species of mammals and birds. But there are also some notable exceptions. The body temperature of the fat-tailed dwarf lemur, for example, can fluctuate by nearly 45°F (25°C) over a single day.