hold down：保住（工作或位置）；壓制；壓住；限制。
He was very lazy，he couldn't
hold down a job.
他很懶，保不住自己的工作。
I took a pencil to hold down the
test papers for fear that they
might be blown away by the wind.
我拿了支鉛筆壓住試卷，以防被風吹掉。
You have to hold down those
people who want will be
promoted in the job.
你必須壓制住這些在工作中將會晉升的人。
You do not have to hold down two keys at once.
您不必同時按下兩個鍵。