“以防”的拼音？

“以防”的英语可以翻译为：in case...

屋子内部被挡住了，以防路人好奇地张望。The interior was shielded from the curious gaze of passersby.许多厂家都购买了保险，以防遭到敲诈。Many manufacturers have policies to protect themselves against blackmailers.他把声音放低以防被人听见。He kept his voice low-pitched in ...