Both the R groups are alkoxy residues.两个R基团都是烷氧基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基....
The freighter fouled its propeller in fishing nets.货船的螺旋桨被渔网缠住了。The freighter steered out of Santiago Bay that evening.那天晚上货轮驶出了圣地亚哥湾.The freighter was launched into water with a great splash.货船入水时溅起巨大的水花....
他恭顺地看着基思，等着他发号施令。He was looking obediently at Keith, waiting for orders.彼得对突如其来的有关基思的问题应答自如，令人叹服。Peter had dealt admirably with the sudden questions about Keith.警员基思·盖特协助逮捕了那些人。PC Keith Gate helped arrest the men....