例句與造句

1. He also testified that his research showed that the Star Bend area had been hit with " sand boils " _ surface eruptions of water that can precede a levee collapse _ on four occasions since 1955.
2. They often lie in a " quiescent " zone with hotter stars generally being more luminous, but periodically undergo large surface eruptions and move to a narrow zone where stars of all luminosities have approximately the same temperature, around 8, 000K . This " active " zone is near the hot edge of the unstable " void " where yellow hypergiants are found, with some overlap.
3. It's difficult to find surface eruption in a sentence. 用surface eruption造句挺難的