他们感到很安全
They feel safe
以上为机器翻译结果，长、整句建议使用 人工翻译 。
在自己创造的世界里他们感到很安全。
They felt secure in a world they had created.
youdao
有一堵厚墙掩护，他们感到很安全。
Being protected by a thick wall, they felt quite safe.
有一堵厚墙掩护着，他们感到很安全。
Being protected by a thick wall, they felt they were safe.
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