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| dB (One tenth of a bel (named after Alexander Graham Bell), a unit used in electronics and other fields to measure the strength of a sound or signal. Decibel measurements fall on a logarithmic scale and compare the measured quantity against a known reference) | |||
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dB : 19 短语, 5 学科 |
| 信息技术 | 3 |
| 农业 | 2 |
| 微软 | 4 |
| 物理科学 | 1 |
| 电子产品 | 9 |