alkali 核心詞議:
n. 堿
alkali 基本解釋
速記方法
速記技巧
詞源記憶法
在中世紀(jì)時,阿拉伯人就掌握了從生長于海邊鹽堿地上的藜科植物saltwort(豬毛草)中提取堿的方法。他們焚燒這種植物,從灰燼中可獲得堿類物質(zhì)。在阿拉伯語中,這種來自灰燼的堿被稱為al-qali,其中al是定冠詞,qali就是“灰燼”的意思。英語單詞alkali就源自阿拉伯語al-qali。
知識擴(kuò)展
詞組短語
alkali resistance抗堿性,耐堿性;耐堿堅(jiān)牢度;alkali metal[化]堿金屬;[醫(yī)]鹼金屬
alkali 變化形式
復(fù)數(shù): alkalis
易混淆的單詞: Alkali
中文詞源:
alkali 堿
來自阿拉伯語al-qaliy. al, 定冠詞。qaliy, 灰,堿灰。
alkali
精選例句
1、 The extremely salty,alkali lake holds little life,but its waters are a favorite spot for wading birds.
其味極咸,堿湖保存了湖中的小生命,但其水域仍為涉水鳥所喜歡的地方。
常見考點(diǎn)例句:
- Most of the injuries reported so far have been alkali burns .
- 到目前為止,大多數(shù)的傷亡報(bào)告都是由于堿燒傷造成的。
- It was not quite the sudden shift from litmus red to blue of an acid being neutralised by an alkali , but it was not far off .
- 雖然不是完全像酸溶液完全被堿溶液中和時石蕊試劑突然從紅變藍(lán)那樣迅速,但是也差不太多。
- One of the first inklings that chemistry has an underlying pattern was the discovery , early in the 19th century , of lithium , sodium and potassium-known collectively as the alkali metals .
- 暗示化學(xué)有基本模式的線索還要追溯到19世紀(jì)早期,人們發(fā)現(xiàn)了被稱之為堿金屬的理,鈉和鉀。
- At the hong kong conference , mr. chen cited chinese miners ' ' sabotage of nature , ' processors ' ' pollution by waste water , slag and gas in smelting and separation ' and the industry 's large-scale use of acid and alkali .
- 在香港的會議上,陳占恒提到了中國礦產(chǎn)企業(yè)對自然的破壞、加工企業(yè)在冶煉和分離時產(chǎn)生的廢水、廢渣和廢氣污染,以及稀土行業(yè)對酸和鹼的大規(guī)模使用。
- To get similar characteristics from composites , the carbon fibres are first chemically treated with an alkali which creates lots of tiny pits on their surface . This massively increases their surface area and hence the charge they can hold , but without impairing the physical strength of the material .
- 要在復(fù)合材料上得到相似的特性,碳纖維最先被用來用強(qiáng)堿進(jìn)行化學(xué)處理,在其表面產(chǎn)生出大量極小的坑,這大大增加了它們表面區(qū)域的面積,由此能容納得了電量,而不有損材料物理上的優(yōu)點(diǎn)。