1. 关键物料：commercial scale 商业规模 | critical materials关键物料 | Retention Samples留样
1. Failure to deliver typically results in a critical shortage in raw materials.
2. One was a story about attempts to purchase critical materials from Niger, and it was the product of rumor and forgery.
3. The union accused China of giving billions of dollars of subsidies to domestic producers, discriminating against foreign firms and goods and restricting foreign access to critical raw materials.