"In his arms" 是在他的怀抱中的正确英文表达方式。
"In his arms" 表示某人被另一个人搂在怀里。这个短语的来源可能来自于人们在表达拥抱或搂抱的情况时的常见用语。
下面是一些英文例句及其中文翻译：
She felt safe and secure in his arms. 她在他的怀抱中感到安全和舒适。
He held her close, and she rested her head on his chest, feepng the steady beat of his heart in his arms. 他把她紧紧搂在怀里，她把头靠在他的胸口上，感受着他怀里心跳的稳定节拍。