parenthesis

詳細解釋：

pa.ren.the.sis

n.（名詞）
【複數】 par.en.the.ses[-sôz.] 縮寫 par.,paren.
Either or both of the upright curved lines, ( or ), used to mark off explanatory or qualifying remarks in writing or printing or enclose a sum, product, or other expression considered or treated as a collective entity in a mathematical operation.
圓括弧，圓括弧：兩個直立曲線或其中之一，（或），用於標出解釋文字及書寫或列印中的限定語或包含一個和、積或其它在數學運算中作為或被當作是一個集體的性質的表達式

A qualifying or amplifying word, phrase, or sentence inserted within written matter in such a way as to be independent of the surrounding grammatical structure.
插入成份，插入詞：在書寫中插入的與上下文的語法結構沒有關係的限定或補充的詞、短語或句子
A comment departing from the theme of discourse; a digression.
插話，插曲，穿插：與討論的主題無關的看法；離題話
An interruption of continuity; an interval:
間歇，停頓：連貫的打斷；間歇：
例句：
.This is one of the things I wasn`t prepared for—the amount of unfilled time, the long parentheses of nothing.(Margaret Atwood)
.這是我沒作準備的事情之一——空閒時間的數量及無所事事的停頓.(瑪格麗特·阿特伍德)

來源：
Late Latin [insertion of a letter or syllable in a word]
後期拉丁語 [在單詞插入一個字母或音節]
from Greek
源自 希臘語
from parentithenai [to insert]
源自 parentithenai [插入，穿插]
para- [beside] * see para-
para- [旁，側] *參見 para-
en- [in] * see en
en- [在…裡面] *參見 en
tithenai [to put] * see dhô-
tithenai [放，置] *參見 dhô-