求翻译：直到90年代初，磁致伸缩- D的大量生产，使其在广大民众中广泛使用，但价格仍然十分昂贵。这种材料是今天Etrema生产产品的姊妹公司S3i所生产的。磁致伸缩三维生产的重大突破，发生在2001年这使磁致伸缩在消费音频产品中得，研发。是什么意思？

Until the early 90 's, magnetostriction of-D mass production, making it widely used in the general population, but prices are still very expensive. This material is produced by sister company S3i Etrema products today. Magnetostrictive production of three-dimensional breakthrough occurred in 2001 which makes the magnetostriction in consumer audio products, research and development.