名词

1.不可数名词：安全，安全感

2.[U,C]防备，保安；防护，防御（措施）(+against/from)

3.[U,C]保证；保障；担保（品）

4.证券，债券

词形变化

复数securities

英语解释

a formal declaration that documents a fact of relevance to finance and investment; the holder has a right to receive interest or dividends

a department responsible for the security of the institution's property and workers

an electrical device that sets off an alarm when someone tries to break in

the state of being free from danger or injury

defense against financial failure; financial independence

property that your creditor can claim in case you default on your obligation

freedom from anxiety or fear

measures taken as a precaution against theft or espionage or sabotage etc.

a guarantee that an obligation will be met