One of those
habits is smoking, which scientists said is the biggest determining factor in a
person's lifespan. 请问老师句中scientists
said理解为插入语,还是理解为从句的主语+谓语,然后which指代smoking作宾语从句的主语?谢谢老师
CNN 《Company Uses Drones In
Reforestation》There's multiple drones operating to perform a task simultaneously.这里的operating怎么理解?其后的to perform是作名词定语,还是表目的呢?
看到这样一个句子:His fingerprints and photograph were sent around the world, including
to England, America, and English-speaking countries in Africa. 请问句中的to可否省略?
Many of the reductions over the past 30 years have been achieved either
by reducing the amount of sugar, salt or fat in a product, or by finding
an alternative ingredient.这个句子have been achieved是什么时态