occur是什么意思？

occur，英语单词，主要用作不及物动词，意为“发生；出现；存在”。

occur的用法

occur的用法1：occur的基本意思是“呈现在视野、思想、意识中”。occur常与介词to连用,意为“发生”“想起”等。

occur的用法2：occur一般只用作不及物动词,含有“出乎意料”的意味,不可用于表达意料之中或计划之中的事情,也不与suddenly连用。

occur的用法3：occur有时还可用作系动词,接形容词作表语,多表示“存在”。

occur的用法4：occur没有被动语态,即使含有被动意义,也须用主动语态来表达。

occur的用法例句

1. If these drugs are stopped abruptly then some withdrawal symptoms mayoccur.

如果突然停服这些药，则可能出现一些戒断症状。

2. Keep a pad handy to jot down queries as they occur.

手边放一本便笺簿，以便有问题时随时记下。

3. Nitrates are chemicals that occur naturally in water and the soil.

硝酸盐是水和土壤中自然存在的化学物质。

4. Emergency cooling systems could fail and a reactor meltdown could occur.

紧急冷却系统有可能失灵，核反应堆有可能发生堆芯熔毁。

5. Unless you respect other people's religions, horrible mistakes and conflict willoccur.

如果不尊重别人的宗教信仰，就会祷下大错，酿成冲突。

6. When vacancies occur, the office puts out feelers to the universities.

有空缺职位的时候，办事处就到各个大学去打探。

7. Changes in temperature occur slowly and are constrained within relatively tight bounds.

温度变化缓慢，而且局限在相对较小的范围内。

8. These snails do not occur on low-lying coral islands or atolls.

在地势低平的珊瑚岛或环礁上没有这种螺。

9. About two in every five epileptic fits occur during sleep.

每5例癫痫病中约有两例是在睡眠过程中发作的。

10. It did not occur to me to check my insurance policy.

我没有想到要核实我的保险单条款。