That's the advice from a new study that finds that people who sit for extended periods of time without taking short breaks are at higher risk for heart disease than those who take more frequent timeouts to stand up and walk around.想问一下timeout在这什么意思?
老师好,几乎所有的语法书都说四季前一般不加冠词,然后给出Spring is my favorite season或Spring is the
best season of the year等例句,这种例句里面的spring都是泛指,所有理所应当的不加冠词,因为牛津字典说spring既是可数又是不可数的名词...