infiltrate|infiltrated|infiltrates

这项计划旨在将环保意识逐步渗透到学校教育中。

The program seeks to ___infiltrate environmental awareness into school education gradually.

冷空气从窗户的缝隙中慢慢渗入房间。

The cold air ___infiltrated the room through tiny gaps in the window.

墨水慢慢渗入纸张纤维，使得字迹难以擦除。

The ink slowly ___infiltrates the paper fibers, making the writing hard to erase.