【解释】人常常在忧患困苦中，才能磨练意志，增长才干。
我们衡量经济成功的方式必须发展，以反映人们生活的现实。
Innovation requires both fundamental research and practical application.
We are all strangers, even to ourselves.
The future of forestry lies in balancing economic needs with ecological responsibility.
Never ask a barber if you need a haircut.