At/in one go (idiom) -

•In one single action; all at the same time.（一口氣，一次過）

Examples:

1.I don't think I'll be able to solve all the problems at one go.　　

2.He ate the whole cake in one go.

•Trial and error (idiom) -

An attempt to accomplish something by trying various means until the correct one is found. （反覆嘗試，試錯法）

Examples:

1.The only way to solve this problem is by trial and error.　　

2.There's no instant way of finding a cure - it's just a process of trial and error.

•Press on/ahead (phrasal verb) -

To start or continue doing something in a determined way, often despite problems.（繼續進行，堅持）

Examples:

1.Shall we press ahead with the minutes of the last meeting?　　

2.The government is pressing on with its plans to reorganize the penal system.

•Cul-de-sac (noun) -

A short road which is closed off at one end; a situation that leads nowhere.（死胡同，僵局）

Examples:

1.It is a well-lit place and, being a cul-de-sac, carries no traffic.　　

2.This surely is an intellectual cul-de-sac.

•Make great strides (idiom) –

To advance considerably; to make good progress.（長足進步，大步前進）

Examples:

1.The government has made great strides in reducing poverty.　　

2.He made great strides in his study of Latin.