1.call for 需要；要求

A few relatively infrequent situations also call for a semicolon.
有几个比较少见的的情况也要求使用分号2kR.m#GltI8。

Cuadrilla's lancashire plans call for hundreds of wells.
而cuadrilla的兰开夏郡计划需要几百口井Re!gypN]yb_。

2.demand to 需求

But the demand to remove his portrait is wrong.
但要求移除他的肖像的做法是错误的E27Ac]Jdbgdy1TT。

New curricula reform brought forward the new demand to teacher's qualities.
新的课程改革对教师素质提出了新的要求h!C)=k7uJTl,^d。

3.encourage to 鼓励

A joint venture is encourage to market its product outside china.
我们鼓励合资企业在中国之外的市场上销售其产品qeK~rBpFNGS3GsW。

I encourage to join the list and contribute your thoughts to the project.
我鼓励您加入这个列表，并提供您对这个项目的想法JDtzzNF#df5c1iPrxg8。

4.convert to 转而变为

After five years, any remaining preferred shares would convert to common shares.
五年后，任何剩余的优先股将转换为普通股Sxkl++nAl.r^DUk_oZ。

And he tells me that when staff do convert to christianity, their attitude towards their work is transformed.
同时他告诉我，当他的员工皈依基督教之后，他们对待工作的态度就转变了B-~O=.jmwAuc9!wtV。