1 . below
(很快地那艘船就沉到水底去了。)below… 在……的下面;低于“below…” 的基本語義是表示位置低于……(lower than…),是above 的相反詞。.
2 . lower than
An instruction for operations at a level lower than machine instructions ., 操作級低于機器指令的一種指令 . 2.Aninstructionofamicroprogram.
3 . less than
...in or to a lower place; directly below; covered by少于,低于less than在…情況下,在…過程中 in the state of; in the process of.
4 . under
under 表示在…下under 在……下面;低于under 在…下