keeping my nose to the grindstone什么意思

keeping my nose to the grindstone什么意思 keeping your nose mindlessly to the grindstone Keeping your nose mindlessly to the grindstone will only get to keep one's nose to the grindstone 请问Keep your nose to the grindstone是什么意思? keep ears to the ground and our noses to the grindstone什么意思 stand nose to nose意思 keeping off the police什么意思 nose to everybody's businesss什么意思? my nose hurts 意思 3个英语短语：leg to leg,foot to foot,nose to nose,什么意思? nose to nose的意思是什么?