the most uncommon years and months of one's life; crowded months and years of endeavour; eventful years; extraordinary times; memorable years (of one's life); months and years of hard struggles [endeavour]; years of tortuous adventures and struggles
Example Sentences:
1.
I shall have it framed as a souvenir of these tremendous days, and as a mark of our friendly relations . 我要把它镶在镜框里，以纪念这些峥嵘岁月，同时它也是我们友谊的标志。
