求翻译：《分析化学实验基本操作》音像教材由天平称量基本操作（约8 min）、滴定分析仪器与基本操作（约30 min）、重量分析法基本操作（约23 min）三部分组成，该教材的编制，解决了分析化学实验教学中常年待已解决的难点，满足了分析化学实验教学的急需。是什么意思？

"Basic Operation of Analytical Chemistry Experiment" audio-visual materials from the basic operation of the weighing scale (about 8 min), titration analysis apparatus with the basic operations (about 30 min), the basic operation of the weight of analysis (approx. 23 min) of three parts, the material

The analytical chemistry laboratory basic operation of the audio-visual teaching materials weighing scales basic operation (about 8 min), by titration analytical instruments and basic operation (about 30 min), the basic operating weight analysis (about 23 min) composed of three parts, the materials,

"Analytical chemistry Experiment Elementary operation eo" the audio and video teaching material by the balance weighing elementary operation eo (approximately 8 min), the titrate analysis instrument and the elementary operation eo (30 min, the gravimetric method elementary operation eo (approximatel

The basics of analytical chemistry experiment of audiovisual teaching materials by weighing scales basics (approximately 8 min), titration analysis instruments and basic operation (about 30 min), weight analysis basic operation (approx 23 min) consists of three parts, the compilation of teaching mat

The basics of analytical chemistry experiment of audiovisual teaching materials by weighing scales basics (approximately 8 min), titration analysis instruments and basic operation (about 30 min), weight analysis basic operation (approx 23 min) consists of three parts, the compilation of teaching mat