You can think of training as a ladder with two named steps on it: unskilled at the bottom, skilled at the top. Semi- means half, so this word puts someone (or some work) half way up. Enough learning happened that you cannot walk in off the street and do it; not enough that anyone would call it a trade.
One branch
訓練只走到一半
兩個意思其實是同一個位置，只是看的東西不同：一個看「人」，一個看「工作」。
adjective · B2
Used about a worker who has learned some of the skills their job needs, usually from short training or from practice on the job, but who has not had the long training that a fully skilled worker has.
半熟練的