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1·Accidents often arise from care lessness.

事故往往起因于粗心。

2·Terry works hard at her elusive dream of oil-lessness.

特里很努力地来实现这个不使用石油的梦。

3·He looked up, straight at me.the help lessness in his eyes shocked me and his silent gaze pierced my heart like a dagger.then it was gone and his cheerfulness returned.

他抬起头来，直望着我，眼中一种茫然无助的神情使我感到震惊。他默默地盯着我，我的心像被刀子刺了一样。