有必要时，你可以向警方求助。
他们有必要时互相帮忙的默契。
They had a tacit agreement to help each other when necessary.
用牢固、刚毛的刷子梳刷，有必要时再洗澡。
Comb and brush with a firm bristle brush, and bathe only when necessary.
有必要时他将向命运投降，但他不会向恐惧投降。
He'll surrender to fate when necessary, but he won't surrender to fear.
中文意思：嗯，我有必要时当然也会开夜车，但没有象你这么经常呀！
LL: I don't believe you sack out at regular hour every night.
我服从理性，有必要时，我可以为它牺牲我的友谊，我的憎恶，以及我的生命。
Me to obey reason, when necessary, I can sacrifice my friendship for it, I hate, and my life.
确认病人对手术有较为现实的预期。必要时应纠正其想法。
Verify that client's expectations of surgery are realistic. Correct expectations as needed.
我有两本护照，这样在必要时我就可以同时进行申请。
I have two passports just so I can juggleconcurrent applications when necessary.
我有两本护照，这样在必要时我就可以同时进行申请。
I have two passports just so I can juggleconcurrent applications when necessary.
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