If you want to be certain of getting a ticket, book now.
要想有把握买到票，现在就得预订。
你可以确信这一点。
But nobody can be certain of the outcome.
但是，谁也不确定这就是结局。
So therefore, I can at least be certain of those.
因此，至少那些我是能够确认的。
I can't be certain of what time I left the office.
我不能肯定我是什么时候离开办公室的。
I cannot be certain of what time I left the office.
我不能肯定我离开办公室的时间。
Fortunately, we do not have to be certain of the causes.
幸好，我们不需要肯定它的原因。
China needs to be certain of having a nuclear second strike.
中国需明确无疑地拥有二次核打击能力。
From one moment to the next, no one can be certain of anything.
从一个时刻到下一时刻，没有什么人能确定什么事情。
Can you ask for fruit at breakfast and be certain of the result?
你能在早餐要求水果并且确定结果吗？
The important thing is to be certain of the volume in the scoop.
重要的是要却定咖啡舀的量。
You also need to be certain of exactly what is included with the system.
你也需要的是什么，一定要纳入该系统。
But the company can at least be certain of some things in the coming years.
但是，耐克公司至少可以确定公司未来几年的美好前景。
For instance, patients cannot always be certain of their medical conditions.
例如，病人对于他们的病情不可能总是有把握。
Use the holiday to participate in social practice, can be certain of the actual operation.
利用假期参加社会实践，能进行一定的实际操作。
Of course, in certain circumstances, a simple wave, nod or smile may be appropriate.
当然，在某些情况下，简单的挥手、点头或微笑可能都是合适的。
The arrival of a letter will be followed by two others within a certain period.
收到一封信后，在一定的时间内会收到另外两封信。
This type of information can only be processed by the system under certain protections.
这类信息仅能由系统在某些保护措施下进行处理。
Some data may not be visible until a certain level of magnification is reached.
某些数据只有当放大到一定级别的时候才是可见的。
这一点，我们是可以确定的。
The game is certain to be one of the biggest of all time.
这款游戏无疑将成为玩法最为丰富的游戏之一。
You can be certain that potential intruders learn of those security holes quickly.
可以肯定，潜在的入侵者会很快了解那些安全性漏洞。
Not to be absolutely certain is, I think, one of the essential things in rationality.
我认为不要绝对地确定乃是理性中最为关键的一点。
First of all, the dancers have to be of a certain height and build.
首先，所有芭蕾舞者的身高和体型都必须一致。
First of all, the dancers have to be of a certain height and build.
首先，所有芭蕾舞者的身高和体型都必须一致。
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