转折关头 meaning in English

turning point
wendepunkt m

All that he did know was that a climacteric in his life had been attained
他只知道自己面临着平生的转折关头。
At the turning of a new century when everything is changing rapidly , people usually give a re - examination to the existing education and try to find out as many faults as possible with the hope of bettering its statement and therefore endow it with new destiny ending in pointing out the problem of teachers " qualities and resetting their social places
只要时代处在深刻变化的转折关头，人们在重新审视现有教育，找出它的问题，希望改变它的现状并赋予它新的使命的同时，总会提出教师的素质问题，为教师的素质重新定位。