spontaneous
英 [spɒn'teɪnɪəs]
美[spɑn'tenɪəs]
	    - adj. 自发的;自然的;无意识的
 
英英释意
- 1. happening or arising without apparent external cause;
 - "spontaneous laughter"
 - "spontaneous combustion"
 - "a spontaneous abortion"
 
- 2. said or done without having been planned or written in advance;
 - "he made a few ad-lib remarks"
 
- 3. produced without being planted or without human labor;
 - "wild strawberries"