二选一的 meaning in English

alternative

Since when does it have to be one or the other
从什么时候起必须是二选一的？
American men now face a one - in - two chance of contracting prostate cancer in their lies
美国男性现在面对一个二选一的患上前列腺癌的可能性。
But if the product is right , enough new users will be attracted to form an alternative definition for progress
但是一旦这个产品是正确的，足够多的消费者被吸引进来，那么行业的发展方向的定义将会因为进行一个二选一的抉择。