Consent or acquiescence of the owner of the servient tenement lies at the root of prescription, and of the fiction of a lost grant, and hence the acts or user, which go to the proof of either the one or the other, must be, in the language of the civil law, nec vi nec clam nec precario. For a man cannot, as a general rule, be said to consent to or acquiesce in the acquisition by his neighbor of an easement through an enjoyment of which he has no knowledge, actual or constructive, or which he contests and endeavors to interrupt, or which he temporarily licenses. It is a mere extension of the same notion, or rather it is a principle into which by strict analysis it may be resolved, to hold, that an enjoyment which a man cannot prevent raises no presumption of consent or acquiescence.

01、总览

这句话可以切分为 3 个逻辑层次：

1. 基础原则（第 1 句前半部分）：供役地所有人的同意/默许是时效取得的根基。
2. 行为要求（第 1 句后半部分）：因此，用来证明这些权利的行为必须符合罗马法中的 nec vi, nec clam, nec precario（非暴力、非秘密、非临时）。
3. 反面解释（第 2 句）：一个人无法阻止的被其他主体使用，不能推定存在同意或默许。

02、逐句拆解

【第一分句】

Consent or acquiescence of the owner of the servient tenement lies at the root of prescription, and of the fiction of a lost grant.

• 主干：Consent or acquiescence lies at the root of...
• 并列介词短语：of prescription, and of the fiction...
• 核心含义：

供役地所有人的 同意（consent） 或 默许（acquiescence）

是时效取得（prescription） 与 “拟制让与” 的根本前提

【第二分句】

and hence the acts or user, which go to the proof of either the one or the other, must be, in the language of the civil law, nec vi nec clam nec precario.

• 主语：the acts or user
• 定语从句：which go to the proof of either the one or the other
• either = prescription
• the other = fiction of a lost grant
• 谓语：must be
• 补语：nec vi, nec clam, nec precario（拉丁语）

【第三分句】

For a man cannot, as a general rule, be said to consent to or acquiesce in the acquisition by his neighbor of an easement through an enjoyment of which he has no knowledge, actual or constructive, or which he contests and endeavors to interrupt, or which he temporarily licenses.

• 主干：a man cannot be said to consent to or acquiesce in the acquisition of an easement.
• 状语：through an enjoyment
• 三个并列定语从句修饰 enjoyment：

1. of which he has no knowledge, actual or constructive （他实际或推定上不知情的使用）
2. or which he contests and endeavors to interrupt （他反对并试图阻止的使用）
3. 
   or which he temporarily licenses （他只是临时许可的使用）
   
   

【第四分句】

It is a mere extension of the same notion, or rather it is a principle into which by strict analysis it may be resolved, to hold, that an enjoyment which a man cannot prevent raises no presumption of consent or acquiescence.

• 形式主语：It
• 真正主语：to hold that ...
• 两个并列表述：
• a mere extension of the same notion
• a principle into which by strict analysis it may be resolved
• that 从句内容：

an enjoyment which a man cannot prevent raises no presumption of consent or acquiescence.

03、全句翻译

供役地所有人的同意或默许，是时效取得及“拟制让与”制度的根基。因此，用以证明其中任何一种权利的行为或使用，用罗马法的表述来说，必须是非暴力、非秘密、非临时的。因为，一般而言，一个人对于他实际或推定上不知情、或他反对并试图阻止、或他只是临时许可的使用，不能被认定为同意或默许邻居通过这种方式获得地役权。这一原则不过是上述观念的延伸，或者说，通过严格分析可以归结为：一个人无法阻止的使用，不能引发同意或默许的推定。