但是我国股市流动性波动率高，并且和市场回报率之间存在单向格兰杰因果关系。
However, fluctuation rate of Chinese stock markets are high, and have unilateral Granger causal-effect relationship.
市场包含了传统仪表，单向通讯AMR仪表，双向通讯AMI仪表，商业用仪表及产业用仪表。
The market includes legacy metering, one-way communicating AMR meters, two-way communicating AMI meters, communications modules, commercial meters and industrial meters.
征地制度作为我国集体土地单向流转进入土地市场的唯一手段业已成为国家与社会关注的焦点。
As the only means our collective land enters into the land market, land expropriation has been the focus of attention of our society.
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