One solitary tower only, and some remains of a wall, show where the castle once stood.

只有一座孤零零的塔楼和一堵残垣断壁表明了这座城堡曾经的位置。

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Only one task may hold the mutex at a time, and only this task can unlock the mutex.

一次只能有一个任务持有互斥锁，并且只有这个任务可以解锁互斥锁。

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A developmental biologist and tissue engineer, Dr. Mironov, is one of only a few scientists worldwide involved in bioengineering "cultured" meat.

米罗诺夫博士是发展生物学家和组织工程师，是世界上少数的几位参与生物工程“培养”肉类的科学家之一。

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Of course, this study is subject to the caveats that it: (a) only involved one decision making task and (b) only involved undergraduate students.

FORBES: Have a Tough Decision to Make? Science Says: 'Sleep On It!'

The Duke sings "Possente amor (A great love)" while swilling Scotch from a bottle (one verse only) and "La donna e mobile (Women are fickle)" while swinging around the stripper pole.

WSJ: Mayer's 'Rigoletto,' set in Vegas, opens at Met

Iowa has a nonpartisan system to draw districts, and California will get one (albeit only for state legislative districts) if a ballot initiative passes this fall.

FORBES: DIY Democracy