既然雨下得这么大，你与其离开倒不如待在这儿。 Since it is raining hard, you may as well stay here as leave.
既然她病得厉害，我们要马上去请医生。 Since she is seriously ill, we have to send for a doctor at once.
既然你坚持，我就只好修改信用证。 Since you insist, I must amend the letter of credit.
一本好的学生字典应该既提供词语的含义，又举出应用这些词语的例子。 A good learner's dictionary should give both the meanings of the words and examples of the constructions in which they are used.
海狸既能在陆上生活也能在水里生活。 The beaver lives both on land and in water.
既然他已经悔罪了，我认为他不会再那样做了。 Since he has been penitent, I don't think he will do that again.
既然你无法回答这个问题，我们最好再问问别人。 Since you can't answer the question, perhaps we'd better ask someone else.