optional

💬 双语例句

1. Being challenged in life is inevitable, being defeated is optional.

   生命中你无法选择接踵而至的挑战，但是你可以选择不成为一个失败者。

2. These losses are tragic, but they are also avoidable. They serve as a reminder that disaster preparedness is not an optional luxury; it is a constant, intensive process that is necessary to save lives, protect infrastructure, and safeguard development.

   这些损失是悲剧性的，但也是可以避免的。 它们提醒我们，灾难预防并非可选择的奢侈品；它是一个持续的、密集的过程，是拯救生命、保护基础设施和捍卫发展的必要条件。

3. It should also consider adding an optional “two-key” system, in which an independent signoff from a separate account is required before a proposed tweet is broadcast. But, while such measures would increase the difficulty of hacking the system, no technological fix can make it impenetrable.

   推特服务的技术漏洞在此之前已经引发关注，目前正在向复杂的验证模型过渡（密码搭配经由短信或其他设备发送的一次性密钥 ） 。 推特可能会尽快落实这种方式。 推特还应该考虑增加选择性“双密钥”系统，即在相关推特发出前由其他账户进行独立签发。 但尽管上述措施可以加大黑客攻击系统的难度，但任何技术措施都并非牢不可破。

🔗 常用搭配