原子能领域专业人才应当坚持立德为先、诚信为本，弘扬科学家精神，遵守学术和伦理规范，恪守职业道德。
A solution requires solving the hardest known problems in the universe, often requiring years (if not decades) of effort
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k--; // 剩余删除名额减1（关键：控制删除位数，保证保留足够长度）
Strands, the New York Times' elevated word-search game, requires the player to perform a twist on the classic word search. Words can be made from linked letters — up, down, left, right, or diagonal, but words can also change direction, resulting in quirky shapes and patterns. Every single letter in the grid will be part of an answer. There's always a theme linking every solution, along with the "spangram," a special, word or phrase that sums up that day's theme, and spans the entire grid horizontally or vertically.