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Source channel @githubtrending · Post #15048 · Aug 12
#typescript The GitHub Actions Checkout action lets you download your repository code into the workflow environment so your automation can access it. It supports fetching specific branches, tags, or commits, and can fetch full history or just the latest commit. You can use tokens or SSH keys for authenticated access, enabling secure git commands during workflows. It also supports sparse checkouts to fetch only parts of the repo, and can handle submodules. This action simplifies automating tasks like testing, building, or deploying code by ensuring your workflow has the right code checked out efficiently and securely. https://github.com/actions/checkout
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@kejiqu · Post #4079 · 01/18/2026, 03:13 PM
反物质会‘向上掉落’吗？ 科学家们正在研究反物质的特性，特别是其在重力作用下的行为。一个长期存在的谜题是，反物质是否会像普通物质一样向下掉落，还是会受到某种反向的重力影响而向上运动。这一问题对于理解宇宙的基本规律至关重要，并可能对物理学理论产生深远影响。目前的研究旨在通过实验精确测量反物质的重力行为，以验证现有的物理模型。Space.com 🏷#antimatter#重力#物理学 📢频道👥群组📝投稿
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@cosmomyst · Post #574 · 12/22/2025, 10:21 PM
🪐 The future of interstellar travel could harness the power of antimatter propulsion, a technology based on using matter and antimatter (mirror-opposite particles) that annihilate each other to release immense energy. Experiments at places like CERN have shown how much energy is produced when particles like protons and antiprotons meet—a reaction far more powerful than any chemical rocket, making antimatter a real contender for traveling to distant stars such as Proxima Centauri in the distant future. ✨ #spaceships⚡#antimatter⚡#propulsion⚡#nasa⚡#galaxy⚡#stars⚡#astronomy⚡#universe⚡#cosmos⚡#space 👉subscribe Universe Mysteries 👉more Channels