To explain this, they hypothesise that galaxies must contain a great deal of missing matter which cannot be detected. 为了解释这一点，他们假定各星系一定包含了大量无法探测到的不明物质。
We have not yet learned to punctuate correctly.我们尚未学会正确使用标点符号.The pupils have not yet learned to punctuate correctly.小学生尚未学会正确使用标点符号.The children have not yet learned to punctuate correctly.这些小学生尚未学会正确使用标点符号....
There was a trace of exasperation in his voice.他的声音听上去有些愤怒。Mahoney clenched his fist in exasperation.马奥尼恼怒地攥紧拳头。He snorted with exasperation.他愤怒地哼了一声....
贝尔沃农场生产一种非常好喝的接骨木花茶。说到接骨木花，你兴许想尝尝接骨木花香槟酒。Belvoir Farms produce a delicious elderflower tea. Talking of elderflower, you might wish to try Elderflower Champagne." 她叫贝尔-沃特琳, " 彼得大叔答道." Her name Belle Watling,'said Unc...
Expertly he zigzagged his way across the field, avoiding the deeper gullies.他熟练地左一拐右一拐地绕过深沟，穿过了原野。Avoiding mosquito bites is easier said than done.防蚊叮咬好说难做。I've been avoiding my folks lately.我近来一直在避开家人。...