step in

• They had to cut steps in the ice as they climbed .
  他们往上爬时得在冰上凿出踏脚处。
• Your paper marks a forward step in the research .
  你的报告标志着研究工作的向前发展。
• There might be a few steps in the chain of tenure .
  在土地保有权的环节中可能存在几个步骤。
• I was wet and i must somewhere have stepped in a puddle .
  我身上湿了，一定是在什么地方踩进过水坑。
• Who would step in ?
  有谁会来接替呢？
• The doctor steps in .
  医生插手干涉。
• This is the first step in the transformation of light into electricity .
  这是把太阳光转变为电能的第一步。
• Thickening is the usual first step in sludge disposal processing .
  污泥处置过程中，浓缩通常是第一道工序。
• Sandstone benches are directly related to steps in the strandline .
  岩石的各个砂级和海滨线的位置有着直接的关系。
• The government stepped in to find out why their champions had collapsed .
  政府出面调查足球队的国脚为什么表现不佳。