1.Note that this assumes that key columns are never updated; once a row exists, it is immutably tied to its primary-key value.
注意，这假设从不更新键列；一旦一行存在了，它的主键值就不变了。
2.it is not direct realisation, but it abides permanently and immutably, hence it is said to be real.
这不是直接的认识，它住于永久和不变，因此它说是真实的。
3.and further, it is received unconsciously, not consciously. It depends partly on both persons. And it is immutably fixed beforehand.
此外，它也不是刻意地而是无意地被接收的，它取决于双方。
4.Only reefs stand alone immutably on the beach after a typhoon.
台风过后，海滩上只有那些礁石岿然独存。
5.In Java code, data structures are mutable by default, and you must add more code to make them act immutably.
在Java代码中，默认情况下数据结构是可变的，必须添加更多的代码，才能使它们具有不变的行为。