给 zhòngyīngguànyòngduǎnyù :
zìjǐ piān yā fàng dà qì self-biased amplifier n. zì gěi nóng yè （ shōu chéng jǐn gōng zì jiā shí yòng , wú shèng yú chū shòu zhě ） subsistence farming, ie farming that produces only enough crops for the farmer and his family to live on, leaving no surplus which could besold zì gěi shì yā suō kōng qì cāo zuò hū xī qì self-contain compressed air-operated breathing apparatus zìjǐ shì pēn shuǐ miè huǒ xì tǒng self-contained sprinkler system zìjǐ shì gǎn yān bào jǐng qì self-contained smoke alarm zì gěi shì shǒu tí xù diàn chí diàn dēng self-contained portable electric lamp zìjǐ shì yǎng qì hū xī qì self-contained oxygen breathing apparatus zìjǐ shì shuǐ xià hū xī qì SCUBA zìjǐ shì pào mò xì tǒng self-contained foam system zìjǐ shì qián shuǐ hū xī qì self-contained underwater breathing apparatus zìjǐ shì huǒ zāi bào jǐng qì self-contained fire alarm zìjǐ xìng zuò wù subsidence crop zìjǐ rùn huá bèng self-lubricating pump zìjǐ dī dìng guǎn automatic burette zìjǐ diàn chí shì diàn huà jī local battery telephone zìjǐ zì zú shè qū self-contained community