•Efficacy（noun） - The ability, especially of a medicine, to produce the intended result.（功效，效力（與effectiveness同義））

　　Examples：

　　1.They recently ran a series of tests to measure the efficacy of the drug.　　

　　2.Both vaccines require two doses to reach full efficacy.

　　•Put （one's） mind at ease （idiom） - To reduce or remove one's worry, anxiety, dread, fear, etc.（放心，安心）

　　Examples：

　　1.It may be advisable to have a blood test to put your mind at rest.

　　2.That bonus really put my mind at ease about these debts.

　　•Fix one's eyes on （idiom） - To keep looking at or staring at.（緊盯，凝視）

　　Examples：

　　1.Focusing on the past is like driving on a highway with your eyes fixed on the rearview mirror.　　

　　2.She fixed her eyes on me for a long time before answering.

　　•Attach importance/value... to sth（phrasal verb） - To think that something is important or true and that it should be considered seriously.（重視，認為重要、有價值…）

　　Examples：

　　1.We attach particular importance to good diplomatic relations between the two countries.　　

　　2.She attaches great value to being financially independent.

　　•Give preference to （sb/sth）（idiom） - To prioritise someone or something above someone or something else.（優先選擇）

　　Examples：

　　1.The scholarship committee will give preference to students from disadvantaged backgrounds.　　

　　2.The recruiter was told to give preference to any alumni who apply for the job.