2019-08-16

封面展示的是一种轻便的机械护甲，它可以连接到腰部和大腿，通过为佩戴者的臀部伸肌肌肉提供臀部伸展辅助，从而减少步行和跑步所需的能量。这种机械护甲最低限度的限制性设计可以允许用户自然移动，并且能够在步态之间无缝切换，为未来需要动态和自适应辅助的各种应用铺平了道路。

A portable exosuit that attaches to the waist and thighs reduces the energy required for walking and running by delivering hip extension assistance for the wearer's hip extensor muscles. The exosuit's minimally restrictive design allows the user to move naturally, and it switches seamlessly between the two gaits, paving the way for future applications that require dynamic and adaptive assistance.

2019-08-23

我们需要许多不同的策略支持弱势群体并帮助保护他们的安全。通过在生物学方面的研究、对心理健康护理的改善与可获取性，以及其他多种措施的研究，为预防自杀带来了新的希望。

Many different strategies are needed to support vulnerable people and help them stay safe. Research that sheds new light on biology, improvements in mental health care and access to it, and other approaches are bringing hope for progress in preventing suicide.

2019-08-30

封面图展示的插图是关于许多现实世界的设置都会在各方互动时涉及到私有信息的交换。扑克作为这样一种典型的游戏设置，在过去的70多年里一直是博弈论和人工智能领域的一大挑战。一种新的扑克人工智能Pluribus已经完成了剩余的一个关键目标：也就是当桌上有多个对手时具有超人的表现。之前的超人游戏目标——即使是在完全信息博弈中——是仅限于2人的游戏。

Many real-world settings involve interacting parties with private information. As the prototypical such setting, poker has been a grand challenge in game theory and artificial intelligence (AI) for seven decades. A new poker AI, Pluribus, has reached the key remaining milestone: superhuman performance when there are multiple opponents at the table. Prior superhuman game-playing milestones—even in perfect-information games—have been limited to two-player games.

2019-09-06

封面图展示的是在红海，一个分支疣珊瑚正在产出粉红色的卵子和精子束。这些卵子和精子束将被洋流冲向远方，直到它们遇到配偶——1个精子会使1个卵子受精并产生新的生命。珊瑚产卵通常是在每年某个月份某个特定的夜晚和特定的时间发生1次，但是环境的变化正在破坏这一同步事件。

In the Red Sea, a branching Acropora coral spawns pink egg-and-sperm bundles. These bundles will be carried by the currents until they encounter a match—a sperm fertilizes an egg and new life is created. Coral spawning usually occurs once a year in a certain month, on a specific night, and at a particular hour, but environmental changes are disrupting this synchronized event.