Understandably, ...
用作句子副词，表达对所述情况的合理理解。
Understandably, he was upset.
可以理解，他很沮丧。
可理解地
由于容易理解或同情的原因；以可理解的方式；可懂；可了解；可理解
in a way that is easy to understand
由于容易理解或同情的原因
For reasons that are easy to understand or sympathise with.
以可理解的方式
In an understandable manner.
She was understandably upset after hearing the news.
她听到消息后很沮丧，这是可以理解的。
用法提示：副词understandably修饰整个句子，表示“可以理解地”。
The instructions were written clearly and were understandably easy to follow.
说明书写得很清楚，易懂易跟。
用法提示：副词understandably修饰形容词短语easy to follow，表示“可以理解的”。
Given the complexity of the topic, the students' confusion was understandably high.
考虑到主题的复杂性，学生们的困惑程度高是可以理解的。
用法提示：副词understandably修饰形容词high，表示“可以理解地”。
用作句子副词，表达对所述情况的合理理解。
Understandably, he was upset.
可以理解，他很沮丧。
She reacted understandably.
她的反应可以理解。
强调符合情理，语气比understandably更口语化
强调结果在意料之中，带有一定预测性
强调有正当理由，语气更正式
基于合理推测，但不如understandably肯定
强调显而易见，不一定含理解同情的意味
grammar · medium
易错句子His reaction was understandably.
正确表达His reaction was understandable.
错误：将副词 understandably 误用作表语形容词。正确用法：在系动词后应用形容词 understandable 作表语。
grammar · medium
易错句子She was understandly upset.
正确表达She was understandably upset.
错误：拼写错误，误写为 understandly。正确形式为 understandably，副词修饰形容词 upset。
与“可理解地”相对，指难以理解。
与“可理解地”相对，指不清晰、无法听懂。
与“可理解地”相对，指表达含糊。
形容词 vs 副词；前者修饰名词，后者修饰动词或整个句子
可理解地紧张
She was understandably nervous before her first flight.
她在第一次飞行前可理解地紧张。
可理解地不安
He was understandably upset after losing his job.
他在失业后可理解地不安。
可理解地谨慎
Investors are understandably cautious about the volatile market.
投资者对动荡的市场可理解地谨慎。
可理解地生气
The customers were understandably angry about the delay.
顾客对延误可理解地生气。
可理解地担忧
Parents are understandably concerned about their children's safety.
父母对孩子的安全可理解地担忧。
under- + stand + -able + -ly
under- + stand
under- + stand + -able
与understandably同属理解范畴
常与understandably搭配，指表达清晰
逻辑性是理解的基础
understandably常表示某事合理
解释是为了让人理解
我很生气，这可以理解。
The character, understandably, felt betrayed.
这个角色感到被背叛，这是可以理解的。
Dictionary facts from ECDICT, WIKTIONARY.