The Delta IV Heavy is the largest of the Delta series, packing the punch of three rocket boosters instead of the usual one.
Delta4型重型运载火箭是Delta系列中最庞大的，它配备了三支火箭推进器，而一般型号只有一支。
The Delta IV Heavy is the largest of the Delta series, packing the punch of three rocket boosters instead of the usual one.
DeltaIV重型运载火箭是Delta系列中最大的，配备三个助推火箭。
The Delta IV Heavy is the largest of the Delta series, packing the punch of three rocket boosters instead of the usual one.
DeltaIV重型运载火箭是Delta系列中最大的，配备三个助推火箭。
应用推荐