| 单词 | suspicious substance |
| 释义 | suspicious substance A suspicious substance was sent for lab tests. The Sun Officers searched him and found a suspicious substance. The Sun They can detect airborne particles of suspicious substances, such as hydrogen peroxide, from a distance of 400 metres. Times, Sunday Times Liquid in hold baggage did not present a problem because the larger scanners used to screen it were more sophisticated and better able to detect suspicious substances. Times, Sunday Times The new technology, which works by detecting nitrogen atoms, can identify suspicious substances. Times, Sunday Times |
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