Some of the beads may be doped with a moistureindicator, such as cobalt (II) chloride, which is toxic and may be carcinogenic.
一些珠子可能会添加水分指示剂，如钴(II)氯化物，这是有毒的，可致癌。
2
Soil organic carbon is a key indicator of how well soil will hold moisture, provide nutrients, and remain productive.
土壤中的有机碳是土壤是否能够保持湿度，提供营养和维持生产能力的重要指标。
3
The moisture content of soil is one important indicator of soil which plays an indispensable action in the production and irrigation of agriculture and research of basal theory.