1、strength

體力;力氣;力量

She has always been encouraged to swim to build up the strength of her muscles.

一直有人鼓勵她去游泳以強健體魄。

He threw it forward with all his strength.

他使盡全力把它扔向前方。

(面對困境的)信心，勇氣

Something gave me the strength to overcome the difficulty.

有些事給了我克服困難的勇氣。

His strength is an inspiration to me in my life.

他的自信是對我人生的一種鼓舞。

實力;影響力

America values its economic leadership, and the political and military strength that goes with it.

美國重視其經濟領導地位以及隨之產生的政治和軍事實力。

The Alliance in its first show of strength drew a hundred thousand-strong crowd to a rally.

該聯盟的第一次實力展示便吸引了 10 萬余眾參加集會。

2、concentrate

全神貫注;集中（心思）

It was up to him to concentrate on his studies and make something of himself.

是否能專心學習并取得一定成就要靠他自己。

Water companies should concentrate on reducing waste instead of building new reservoirs.

自來水公司應該集中精力減少水浪費，而不是修建新水庫。

使集中;使匯集

Italy's industrial districts are concentrated in its north-central and north-eastern regions.

意大利的工業區集中在該國中北部和東北部地區。

Most development has been concentrated in and around cities.

土地開發主要集中在城市及周邊地區。