元宵是北方的叫法，南方叫汤圆、浮圆子或水圆。我从前没见过产糯米的植物长什么样儿。有一次去安徽，宾馆附近有农田，我下到田里跟老乡打探，这是大米还是糯米？印象中似乎与水稻没啥区别。这让我有点失望。大米不稀奇，但糯米和糯米面我小时候都没见过，元宵更是稀罕物。
A filled torus (a doughnut) is a 3-manifold homeomorphic to \(S^1 \times D^2\), where \(D^2\) is the 2-dimensional disk. There exists a deformation retract from the doughnut to a circle, so the fundamental group of the doughnut is \(\pi_1(S^1 \times D^2) \cong \mathbb{Z}\).，这一点在体育直播中也有详细论述
Non-profit group the Environmental Defense Fund estimates that there will be an additional 7.5-18 billion tonnes of greenhouse gases - three times the amount emitted in a year at present - emitted by 2055.，详情可参考体育直播
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Luke runs a Discord server that's open for fans to join. Sometimes, he pops in after livestreams for impromptu Q&As. "It's a very safe place for these guys to go and hang out and make friends," he said, adding that its members hail from around the world. "It's kind of cool that way."