de-, 不，非，使相反。-tect, 覆盖，词源同deck, tile. 即揭开覆盖，查明。

1. He conjectured that some individuals may be able to detect major calamities.

他猜测说有些人也许能够察觉重大灾难。

2. We are trying to detect and understand how the climates change.

我们正努力探寻并理解气候是如何变化的。

3. An observant doctor can often detect depression from expression, posture, and movement.

善于观察的医生常常能从人的表情、姿势以及动作诊察出抑郁症。

4. The tests are designed to detect the disease early.

这些检查旨在早期查出疾病。

5. I detect an undercurrent of resentment towards the new proposals.

我察觉到对新提案有一股潜在的不满情绪。