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safety

n. 安全，安全性，安全處所，中衛；adj. 保障安全的；

alert

adj. 警覺的，警惕的，注意的，思維敏捷的，活潑的；n. 警報，警戒狀態；vt. 向…報警；

system

n. 體系，系統，制度，身體，方法；

by

prep. 在…旁邊，表示方式，由于，經過；adv. 經過，表示保留或保存時用，短暫拜訪；

dtmf

abbr. dual-tone multifrequency telephone 雙音多頻電話；

dual

adj. 雙的，兩部分的，二體的，二重的；n. 雙數，雙數詞；

tone

n. [語]聲調，語調，[畫]色調，色澤，明暗，[樂]樂音，全音，全音程，[醫]（正常的）健康狀態；vt. 使更健壯，定調，使變調子，[攝影術]給…上色；vi. 帶有某種腔調，呈現某種色彩，（顏色）調和（與 with 連用）；

mode

n. 方式，狀況，時尚，風尚，調式；

is

vt.& vi. 是（be的三單形式；n. 存在；

introduced

adj. [醫]引種的，引進的；v. 提出( introduce的過去式和過去分詞 )，介紹，引進，作為…的開頭；

...the spiralling vortex airflow that slows the plane.
使飛機減速的螺旋形氣流渦旋

You just go on ahead. I'll come by later...
你只管先往前走。我隨后就來。

He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打兒子的,是恨惡他;疼愛兒子的, 趁早管教.

For further information, please contact 414 3925, extension 2253.
詳情請致電414 3925,轉分機2253。

He sat there while I made the case for his dismissal...
他坐在那兒，聽我陳述解雇他的理由。

Baroness Thatcher's claims seem credible to many.
撒切爾女男爵的主張在很多人看來是可信的。

Nothing to be got without pains but poverty.
一份耕耘，一份收獲。

This decree obliges unions to delay strikes.
該法令迫使工會推遲罷工。

The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索權當有支付義務的第一方不能支付時，可以向商業票據的背書人要求支付的權力。

They speak of my drink that never consider my drouth.
不問來龍去脈,只知一味責怪.

He pointed up to the roof, through which the steady drumming of rain could be heard.
他向上指著屋頂，透過這里可以聽見雨點嘀嘀嗒嗒落個不停。

Tambourine is an instrument consisting of a small drumhead with jingling disks.
小手鼓是一種由邊緣嵌有能叮當作響的小金屬片的小鼓面.

Squeeze the rubber bulb and insert the dropper into the bottle.
擠壓橡膠球和插入滴管到瓶子里面.

I have never heard such silly drivel in all my life.
我一生中從未聽到過這樣的蠢話.

It is as helpful as throw a drowne man both end of a rope.
正如把繩子的兩頭給溺水的人一樣有用.

" It is a bit of quiet , unassuming drollery which warms like good wine.
" 這是一段既不嘩眾取寵又不矯揉造作的滑稽表演,像美酒一樣溫馨.

That name - dropper mentioned " his pal ", the chief of police.
那個家伙又抬出他的 " 兄弟 " 警察局長的名號來自抬身價.

The drupe fruit tree can't fruit in the dysplasia of the plumule.
核果類果樹在胚芽發育異常時不能坐果.

Owing to climate was being droughty from terminal late Pleistocene, so Aibihu Lake ceaselessly shrank.
晚更新世晚期開始,由于氣候逐漸變干,艾比湖不斷萎縮.

There is a high dropout rate from some college courses.
有些大學課程的退出率很高.

The precursor and powder were characterized by XRD 、 DTA 、 ICP 、 TEM 、 BET.
采用XRD、DTA、ICP、TEM、BET等手段表征了前驅體和產物的特征.

THREE NEW SPECIES OF NICRICOLOR SPECIES - GROUP OF DROSOPHILA ( LORDIPHOSA ) ( DIPTERA: DROSOPHILIDAE )
黑色拱背果蠅種組三新種記述 ( 雙翅目: 果蠅科 )

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A safety alert system by DTMF ( Dual - tone multifrequency ) mode is introduced.是什么意思？

A safety alert system by DTMF ( Dual - tone multifrequency ) mode is introduced.

介紹一種采用DTMF ( Dual -ToneMultifreqency ) 信號方式通信的安全報警系統.