The caves can be visited only by prior arrangement.
这些洞穴只能预约参观。
Her hatred of religion is equalled only by her loathing for politicians.
只有对政客的厌恶才能与她对宗教的憎恨同日而语。
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。
The first library in the United States was a private library, which could be used only by authorized readers.
美国的第一家图书馆是一家私人图书馆，只能被授权读者使用。
The authoritative answers could be given only by Lenin himself, the head of the Government of the Soviet Republic.
这三个问题的官方答案只能由苏维埃共和国政府的领袖，列宁自己来解答。
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。
These rings are indicative of the crystal structure of nickel and can be explained only by invoking wavelike properties of light.
这些光圈表明了了镍的晶体结构，而且只能通过光线中波的特征来解释。
Prior to 1815, western farmers who did not live on navigable waterways were connected to them only by dirt roads and mountain trails.
1815年之前，那些没有生活在通航的水路旁的西部农民只能从土路和山道前往那些航道。
It argues that since prosecutors do not consume a company's products as part of their investigations, they could be influenced only by the halo effect.
它认为，因为检察官的调查并不包括消费企业产品，所以他们就只可能被“光环效应”影响。
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。
You can see that only by tracing a particular family line, possibly back to the 14th century or beyond, will you discover which version of a surname is yours.
你可以看到只有通过追溯一个特定的家族谱系，可能追溯到14世纪或更早，你才能发现哪个版本的姓氏是你的。
We know about our world because we've interacted with it, and only by simulating this interaction in our heads can we comprehend the behavior of someone else.
我们了解我们的世界，因为我们在与之交互，并且仅当我们在大脑中模拟这些交互时，我们才能理解其他人的行为。
Generally costing several hundred dollars, they are usually given only by psychologists, although variations of them populate bookstores and the World Wide Web.
它们通常要花费几百美元，通常只由心理学家提供，尽管书店和万维网上充斥着它们的变体。
Trade was the mainstay of the urban economy in the Middle East, as caravans negotiated the surrounding desert, restricted only by access to water and by mountain ranges.
因为商队只能通过水路和山脉进入沙漠，贸易就成为了中东城市的主要经济支柱。
She shunned bodily ornamentation and strove to use only the natural movements of her body, undistorted by acrobatic exaggeration and stimulated only by internal compulsion.
她避开身体上的装饰，努力只使用身体的自然动作，不被杂技般的夸张所扭曲，只被内心的强迫所刺激。
Without stirrups horse and rider are, in terms of force, separate entities; lances can be used from horseback, but only by throwing or stabbing, and mounted warriors gain only height and mobility.
没有马镫，马和骑手在力量上是独立的实体；长枪可以从马背上使用，但只能通过投掷或刺杀，骑兵只能获得高度和机动性。
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。
BDS is shared only by China as public resources.
北斗系统仅在中国作为公共资源共享。
At first, you learned them only by hearing other people talk.
一开始，你只能通过听别人说话来学习它们（单词）。
Only by reading more can we gain more knowledge and broaden our horizons.
只有博览群书，我们才能增长知识、开拓眼界。
The doctor told him that only by doing a cornea transplant operation could he bring his sight back.
医生告诉他，只有做角膜移植手术他才能恢复视力。
Only by working harder and harder can the future become happier!
只有努力、再努力，才能让将来更幸福！
Only by doing so can we maintain the vigor and vitality of our nation.
只有这样做，我们才能使的国家保持生机和活力。
Only by using modern irrigation methods can we reduce water shortage in agriculture.
只有使用现代的灌溉方法，我们才能减少农业用水短缺的情况。
Only by facing and overcoming difficulties in our life can we grow up happily and healthily.
只有面对和克服生活中的困难，我们才能快乐健康地成长。
My interest was aroused only by the fact that the word "Poems" appeared in hot pink letters.
“Poems”这个单词以粉红色字母出现激发了我的兴趣。
Only by owning loneliness, pulchritude and solitude, can we have our flowers fostered many years.
只有拥有了孤独、美丽和孤独，我们才会拥有自己数载人生培育的花。
Only by increasing the number of doctors by 50 percent can the patients be treated properly in this hospital.
只有把医生的人数增加百分之五十，病人才能在这家医院得到妥善的治疗。
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。
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