For young children, mother's voice is a reference of special significance.
对幼儿来说,妈妈的声音是具有特殊意义的参照物。
The major problems in biology are not solved by new techniques but by new concepts.
渔业技术创新应专注于减少误捕,而不仅仅是增加捕获量。
The only reason people want to be masters of the future is to change the past.