以下是托福詞匯詞根速記：ac的內(nèi)容。
詞根ac=sharp尖
詞根速記：
聯(lián)想：AC米蘭是“頂尖”足球球隊，ac表示“尖”，搞定!
單詞速記：
| ac | -id后綴 | acid(味道尖，說話尖) adj. 酸的；尖刻的，刻薄的 |
| -ute后綴 | acute（各種場合的尖） adj. 嚴(yán)重的；急性的；敏銳的 |
★ acid /'æsɪd/ adj. 酸的;尖刻的，刻薄的 11
老邪解詞：
詞根ac-尖，-id形容詞后綴，味道尖即酸酸的感覺;說話尖，就是這人說話尖刻、刻薄，兩個語境下的兩種意思。
意由境生：
A lemon is an acid fruit. 檸檬是一種酸的水果.
Vinegar has an acid taste. 醋有酸味.
an acid wit 譏諷的才智
His remarks were rather acid. 他的話有些尖酸刻薄.
★ acute /ə'kjut/ adj. 1
(情況)嚴(yán)重的;(感覺)強烈的;(疾病)急性的;(感官)靈敏的;敏銳的，有洞察力的;
老邪解詞：
詞根ac尖，-ute形容詞后綴，大家可以發(fā)現(xiàn)這個單詞的意思極多，大家只需要把握這個詞的“核心含義”即可，就是在各種情況下，變“尖銳”時表現(xiàn)出的，大家記住這個詞核心感覺就好!
情況“尖銳”：嚴(yán)重的，極大的;
感覺“尖”，針刺的感覺：強烈的，劇烈的
疾病“尖銳”：(疾病)急性的
感官“尖銳”：靈敏的
形容人“尖”：聰明、敏銳
大家體會一下，詞無本意，意由境生。
詞源鏈接：
朗文當(dāng)代英語詞典：
[Date: 1300-1400; Language: Latin; Origin: , past participle of acuere 'to sharpen', from acus 'needle']
來自于needle，你就告訴我，快點告訴我，尖不尖?尖不尖?尖不尖?劇不劇烈?急不急性?
意由境生：
suffer acute hardship 遭受極大的苦難;
There's an acute shortage of water. 嚴(yán)重缺水.
suffer acute pain, embarrassment, remorse, etc 感到劇烈的疼痛、極度的尷尬、深深的懊悔等
Young children have a particularly acute sense of smell.
an acute analysis of Middle Eastern politics有洞察力的分析
TPO鏈接：
Carbon dioxide in the air reacts with the rainwater, forming a weak acid (carbonic acid) that may chemically attack the rocks. (OG)
Their calculations show that the impact kicked up a dust cloud that cut off sunlight for several months, inhibiting photosynthesis in plants; decreased surface temperatures on continents to below freezing; caused extreme episodes of acid rain; and significantly raised long-term global temperatures through the greenhouse effect. (TPO8)
It subconsciously adjusts breathing rate and depth in order to regulate the levels of carbon dioxide (CO2) and oxygen (O2), and the acid-base ratio in the blood. (TPO24)
Analysis by gel electrophoresis revealed slight differences in amino acid sequence of the enzymes of two of the four pairs. (TPO31)