重點(diǎn)講解：
1. focus on 集中(注意力)；關(guān)注；
The research effort has focused on tracing the effects of growing levels of five compounds.
研究重點(diǎn)追蹤了5種化合物含量上升的影響tnOKVEHR#K^xg=Ia;。
2. along with 與…一起；
The baby's mother escaped from the fire along with two other children.
嬰兒的母親和另外兩個(gè)孩子一起逃離了火海8_UM45T&*obC.p0~3!*。
3. at least （數(shù)量）至少，不少于；
He had been sitting on the document for at least two months.
他已經(jīng)將這份文件壓了至少兩個(gè)月iWM9;7yR6s+DXs。
4. contend with 競(jìng)爭(zhēng)；爭(zhēng)奪；
It is time, once again, to contend with racism.
又一次到了與種族主義戰(zhàn)斗的時(shí)刻了9G#xOb=k7aTEBHI。