慢速英语:US Students Built Robot to Uncover Submerged Unexploded Mines

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1. Perseus II also has a set of lasers, they are used to measure the size of an object.

be used to 习惯于，适用于
例句：Petroleum can be used to produce various chemical products. 
石油可用于生产多种化学产品。 

2. "Their goal was to go down and find this unexploded ordnance and not only just find them but provide information to an expert on the surface so he or she could make a decision whether it was something dangerous or not," DeLorne said.

not only ... but(also) 不但...而且...
例句：That was not only understandable but inevitable.
这不仅可以理解，而且也是无法避免的。

3. Michael DeLorne says the students came up with some resourceful solutions for difficult problems, one such problem was how to control the position of the robot while underwater.

come up with 追赶上; 比得上; 想出
例句：Slow down a bit and let me come up with you. 
跑慢一点让我赶上吧。