關鍵字彙：
asset/ canker/ deleterious/ demon/ detrimental/ drawback/ inimical/ innocuous/ insidious/ lethal/ liability/ militate against/ noxious/ optimum, optimal/ pernicious/ salutary/ sinister/ vantage point
1. 指不討好或令人不快之事「有益的」用salutary：
•A light punishment will have a salutary effect on the boy.
•It was a salutary experience for him to be forced to work hard.
2. 「最佳的」、「最有利的」叫optimum (optimal)，可供攻擊、防禦、觀測的「有利位置」叫vantage point：
•The expert is trying to figure out what is the optimum degree of economic recovery.
•She believed that being a nurse was her optimum choice for a lifelong profession.
•According to the teacher, this was the optimum level of academic achievement that John could arrive at.
•They fired upon the enemy from behind trees, walls, and any other vantage point they could find.
•If we climb to the top of the ground, it will give us a vantage point to see the basketball game.
3. 「優點」、「長處」、「特質」、「有助益之人」、「得力助手」可用asset：
•Good health is a great asset.
•Eloquence was his only asset.
•Her eyes are her best asset.
•Knowledge of computer science is a real asset for this job.
•She is a great asset in our class.
•The scrupulous and efficient secretary was a wonderful asset to the company.
4. 「有害的」可用deleterious、inimical、noxious（以上3字相對正式）、detrimental或pernicious，「無害的」用innocuous：
•Workers in nuclear research must avoid the deleterious effects of radioactive substances.
•Many of Trump's actions are inimical to America's real interest.
•They tried to get rid of all the inimical factors.
•These are conditions inimical to comfort.
•Excessive managerial control is inimical to creative expression.
•Those noxious doctrines must be eradicated.
•Smoking is detrimental to health.
•The teacher argued that these books had a pernicious effect on young and susceptible minds.
•Let him drink it; it is innocuous.
•It was an innocuous remark, but it enraged him.
5. 「逐步和暗中危害的」叫insidious，「陰險的」、「陰森的」、「具威脅性的」用sinister，「致命的」可用lethal：
•The cancer cell is insidious because it works secretly within our body for our defeat.
•Hypertension is an insidious disease that has few symptoms.
•Fewer-children tendency is no longer an insidious condition but a mammoth crisis that needs to be immediately and effectively addressed.
•A sinister-looking man stood at/ on the corner of the street.
•The derelict old building had a sinister appearance.
•We must defeat the sinister forces that seek our downfall.
•It is unwise to leave the lethal weapons within the reach of children.
6. 「缺點」、「壞處」、「負面效果」可用drawback，「成為妨礙或累贅的事物或人」用liability（非正式），描述情況「成為妨礙」也可用片語militate against：
•The only drawback of this plan is that it costs too much.
•Everything has its drawback.
•Illegible handwriting is a liability in getting a job.
•This old car is a real liability; I can't use it but have to pay for somewhere to keep it.
•The devout Buddhist parents did not regard their disabled child as a liability but a blessing from Buddha instead.
•The fact that he had been in prison militated against his chances of getting fresh employment.
•Mary's humble birth and low education did not militate against her ultimate success.
7. 「危害個人或社會的壞情況」、「禍害」可用canker，「魔鬼」、「似魔鬼之人或事物」可用demon：
•Violence is the canker in our society.
•Money, when corruptly used, can be a canker.
•The demon of avarice ruined his own happiness.
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