The caves can be visited only by prior arrangement.
这些洞穴只能预约参观。
For a long time, people thought that we learned a language only by imitation and association.
长期以来，人们认为我们只能通过模仿和联想来学习一门语言。
Unlike free public libraries, which are open to everyone, private libraries can be used only by authorized readers.
与对所有人开放的免费公共图书馆不同，私人图书馆只能由被授权的读者使用。
The blackness of darkness reigned, the perfect stillness was interrupted only by occasional mutterings of distant thunder.
一片漆黑，万籁俱寂，只有远处偶尔传来隆隆的雷声打破这寂静。
We are taught to believe that only by going to the best schools and getting the best grades can we escape the rat race and build a better future.
我们所受的教育告诉我们，只有上最好的学校，取得最好的成绩，才能从激烈的竞争中逃脱，创造更美好的未来。
In reality, however, decisions are shaped not only by a manager's own values, but also by those of the corporate culture and of organizational superiors.
然而，在现实中，决策不仅取决于管理者自身的价值观，还取决于企业文化和组织上级的价值观。
Danielle was among the last to find out, and as often happens, too, she learned of it only by chance.
丹妮尔是最后一个才知道的人之一，而且同往常一样，她也只是偶然听到的。
Officials also hope for a much larger benefit: more long-term decision making, not only by banks but by all corporations, to build a stronger economy for future generations.
官员们也希望获得更大的利益：不仅是银行，而是所有企业都能做出更长期的决策，为子孙后代建设更强大的经济。
All existing supplies of helium ought to be conserved and released only by permit, with medical uses receiving precedence over other commercial or recreational demands.
现有的所有氦供给应该被保存下来，并且只有在获得许可的情况下才能释放，医疗用途优先于其他商业或娱乐需求。
Firstly, all existing supplies of helium ought to be conserved and released only by permit, with medical uses receiving precedence over other commercial or recreational demands.
首先，所有现有的氦供应应该被保存下来，并且只有在获得许可的情况下才能释放，医疗用途应优先于其他商业或娱乐需求。
In programming a filter, you're limited only by your imagination.
只要发挥您的想象力，就能编写出各种过滤器程序。
I am often thrilled and over-excited while shopping, but only by bargains.
我经常在购物时极为激动兴奋，但这只是在看到特价货的时候。
A: We often say that China and Japan are separated only by a narrow strip of water.
答：我们常说中日两国一衣带水。
And this amazing beach, accessible only by boat or a treacherous climb, is Gray's canvas.
这片神奇的海滩就是格雷的画布，到那里只能靠小船或危险的攀爬。
Thus, if only by some crude law of relativity, autumn is the preferred stock of seasons.
因此，即使用相对性这种粗浅的法则来衡量，秋天也是四季中最受欢迎的。
There are some secrets of the pharaohs, however, that can be revealed only by studying their mummies.
但是，法老的某些秘密只有通过研究他们的木乃伊才能得以揭示。
Elizabeth could not repress a smile at this, but she answered only by a slight inclination of the head.
伊丽莎白听到这些话，不由得微微一笑，她只稍微点了一下头，并没有做声。
Lacking an outlet, the Caspian Sea loses water only by evaporation, leading to the accumulation of salt.
由于没有排水口，里海的水量流失只能依赖蒸发，这也造成湖水中盐的积聚。
To store water means to store happiness and only by saving water can we save a better life for our offspring.
节约用水就是存储幸福，只有节约用水才能为子孙后代存储更好的生活。
Business practices, however, are affected not only by who owns the company but also by where it does business.
然而，商业活动不仅受公司所有者的影响，还受业务开展地点的影响。
Mr Jarre learned then, as he might have intuited before, that he could make the music work only by watching the film.
从那之后，贾尔先生明白了，就像他从前可能直觉地感受到的那样，他只能靠看电影才能作出合适的曲子。
I am going to let my wife know just how loved and appreciated she is, not only by my words, but also by my actions.
我要让我的妻子知道我是多么爱她、欣赏她——不仅要说出来，还要用行动向她表示。
Or, perhaps it's because they believe that only by being without distractions can you truly experience the world around you.
亦或他们认为只有在毫无牵绊的条件下才能真正地体会周围的世界。
Today, the Chinese New Year is celebrated not only by the Chinese people, but also by the people in every part of the world.
春节现在不仅是中国人的节日，也正在成为各国人民共同的节日。
Because many strategies could succeed only by "preying" on other strategies, they would thrive only as long as their prey survived.
许多策略都是通过“捕食”其他策略来取胜的，因而，只有当猎物能存活时，这些策略才能兴旺发达。
They will grow up sooner than you think - build a memory, if only by baking cupcakes together or by having a fun picnic in the park.
他们比你想象中成长的快——制造一些回忆，哪怕只是一起烤制玛芬蛋糕或是在公园里快乐地野餐。
They will grow up sooner than you think - build a memory, if only by baking cupcakes together or by having a fun picnic in the park.
他们比你想象中成长的快——制造一些回忆，哪怕只是一起烤制玛芬蛋糕或是在公园里快乐地野餐。
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