气相色谱分析中是否一定要用质谱检测器？
Do we always need mass spectrometry with gas chromatography?
经济的飞速发展是否一定要以牺牲环境为代价？
The rapid development of economy is it really necessary to the expense of the environment?
将来的某个时候，你也许会问你为什么要跑步，想知道你是否一定要继续跑步。
At some point, you may question why you run and wonder if you should continue to get out there.
但是我们一定要在这几天内确定是否能获得货源。
你是否被驱迫着去赢取，但却推向先生“我一定要舒适自在”以求得安逸无事？
Are you driven to win, but pushing Mr. "I must be comfortable" to score the touchdown?
我们一定要弄清楚这是否合法。
昨晚我感到很糟，心受到伤害，我是否应该忘记？我肯定我决不会忘记，我一定要坚强。
I felt very bad last night, heart was hurt, if I should forget or not? I'm sure I'll never forget, I must be strong.
一定要记住打电话给保险公司决定是否需要这份附加保险。
Always call the insurance company to determine if you need the extra insurance or not.
我的意思是，你是否曾经醒来的时候意识到你一定要做某件事情。
I mean, have you ever woken up and really had to have something.
因此一定要充分测试来决定是否你的系统可以使用方法4。
Therefore we must fully test to determine whether your system can use 4.
您的医生或者心理专家是否建议您目前一定要保持情绪稳定？
Does your doctor or psychiatrist recommend you have stable emotions at this time?
如果你是女士，那么请你一定要确信是否对此举感到满意。
If you are a girl then ensure you feel comfortable with this happening.
不管汤姆的父亲是否允许，他（汤姆）一定要买辆新车。
Tom will buy a new car, whether his father permits him or not.
不管汤姆的父亲是否允许，他（汤姆）一定要买辆新车。
Tom will buy a new car, whether his father permits him or not.
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