The author makes the proposal of establishing a preliminary underground gas drainage numerical model, which is the equivalent of boundary conditions and shift forward of initial conditions.

本文从数值模拟的角度提出了建立井下瓦斯抽放数值模型的初步方案，即将边界条件等效和模拟时间前推。

youdao

Some of the most drastic cuts in Mr. Bloomberg's preliminary proposal would affect schools.

WSJ: Mayor's Final Budget Is Aided by Economy

As previously disclosed on January 8, 2013, Clearwire did not take the initial draw under the Sprint Financing Agreements as DISH indicated that its preliminary proposal would be withdrawn were Clearwire to draw on the financing.

FORBES: Is Clearwire's "Special Committee" Finally Doing Its Proper Job?

On Thursday, Mr. Michael Bloomberg is expected to release his preliminary budget proposal for the fiscal year beginning July 1.

WSJ: Stringer Calls for Tax Cut