名詞 sill:

1. structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure
2. (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock

1. The lowest sill, block, or timber supporting a building, located at or below ground level.
   底基用來(lái)支撐建筑物的最低的基木、砌塊或木料，位于地面或低于地面的
2. The conditioned response, once it is firmly established, can be extinguished dozens of times, but it sill always return, like the proverbial bad penny.
   條件反射一經(jīng)形成，雖然可以一次又一次地壓制下去，但是它總會(huì)重新再現(xiàn)，真是擺也擺不脫扔也扔不掉。
3. A thin plank fastened to the side of a boat or to the sill of a port to keep out the sea and the spray.
   擋水板，防浪板縛于船邊或港基的薄木板。用來(lái)阻擋海水及其噴濺
4. Solidifying chiefly as a minor intrusion, especially as a dike or sill, before reaching the earth's surface. Used of rocks.
   半深成的，淺成的在到達(dá)地球表面之前的主要作為小型巖石群固化的，尤其象巖脈或巖床的凝固用于指巖石