The president has been accused of failing to articulate an overall vision in foreign affairs.
总统被指责没能清楚地表述对外交事务的总体设想。
His vision was failing, and keeping his eyes focused on a page had become exhausting and painful, often bringing on crushing headaches.
事实上，当时尼采的视力正在变坏，长时间将视线固定在一张纸上令他感觉疲惫和痛苦，还常常伴有欲裂的头痛。
Understanding the biological glitches behind short-sightedness could help researchers develop eye drops or tablets that could be given to children to stop their vision from failing as they get older。
找到近视的生物起因可以帮助研究人员研制出防止儿童视力随年龄增长不断下滑的眼药水或药剂。
Understanding the biological glitches behind shortsightedness could help researchers develop eye drops or tablets that could be given to children to stop their vision from failing as they get older.
认识导致近视眼的基因缺陷可以帮助研究者开发眼药水或者药片，这些药品可以给孩子用来防止他们随着长大而视力衰退。
Understanding the biological glitches behind shortsightedness could help researchers develop eye drops or tablets that could be given to children to stop their vision from failing as they get older.
认识导致近视眼的基因缺陷可以帮助研究者开发眼药水或者药片，这些药品可以给孩子用来防止他们随着长大而视力衰退。
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