Given that core inflation was so low when the recession began, it is not a stretch to believe that, with so much slack in the economy, it could yet turn negative.
由于衰退之前的核心通货膨胀率并不高，人们很容易就会想到在经济萧条之后，通货膨胀率可能会降到负数。
2
WHEN Charlotte Hobbs decided to teach her 11-year-old pupil about the "imaginary" maths needed to work out the square root of a negative number, she knew it would be a stretch.
当夏洛特·霍布斯决定教她11岁的学生用来计算负数平方根的虚数时，她知道这是一个艰巨的任务。
3
Research on the negative plates with copper-stretch-metal (CSM) and lead-alloy grids was helpful to take good use of negative plate with CSM grid.